Borderlands 3 FL4K Leveling Build Guide

Our FL4K leveling build guide features the top skills to get you to max level quickly in Borderlands 3!

Our Borderlands 3 FL4K Leveling Build Guide features a complete step-by-step leveling guide, mainly focusing on your output of critical damage and aggro relief while keeping the early progression exciting and powerful. By the end of this build, you'll be using the action skill Fade Away in conjunction with many of the skills that amplify critical damage.

Fl4k is a very viable option for solo play! With a selection from three trustworthy companions (Skag, Jabber, Spiderant), a constant pet by your side will lessen the aggro from large groups of enemies, taking most of the pressure off of you.

FL4K Full Build

Although this build heavily leans on offensive skills, few of Fl4k's skills in this build compensate for the lack of survival with tons of HP regeneration and aggro relief. When facing a troubling enemy, just use Fade Away and hold down the trigger. After using your action skill, you'll be able to regain it in no time with cooldown reduction skills.

The following is the full build you will end up with, but it isn't how you should level it up initially. We've got a step-by-step guide below that features what skills you should have as you level your character!

View the Build on the Borderlands Skill Tree Editor

FL4K Leveling Build Guide

Hunter Tree - Levels 2 - 7

At level 2, you'll be able to use your action skill and pet. I advise Spiderant Centurion for a durable companion and also gives you a constant 1% HP regeneration. You can also issue an attack command for your Spiderant to charge at enemies. Keep in mind that it has a short cooldown. For the action skill, stick to Gamma Burst for AoE (area of effect) and pet buffs.

After reaching level 3, go to the Hunter (orange) tree on the first tier and add 2 skill points to Interplanetary Stalker and 3 skill points into Leave No Trace. This gives you multiple bonuses for one skill. Additionally, it stacks to gain increased bonuses depending on the type of enemies you kill. For Leave No Trace, you will be able to add free ammo in the chamber for simply attacking an enemy's critical spot, allowing you to shoot further before reloading (Second Intention gives slightly faster reloading, but is somewhat redundant to the future of this build as you'll keep regenerating ammo!).

Hunter Tree - Levels 8 - 12

In the 2nd tier, you've unlocked an augment for the action skill Rakk Attack! which you should switch Gamma Burst out with. Apply Rakk Open a Cold One to convert the action skill's base fire damage into cryo, potentially freezing enemies, allowing easier critical shots. Spend 2 skill points into Head Count for the possibility of reducing your action skill cooldown upon dealing critical damage. Next, finish up Interplanetary Stalker by maximizing 5 points into it.

Hunter Tree - Levels 13 - 17

For 3rd tier, spend 5 points into Two F4ng for up to 25% chance to shoot a free extra projectile from your weapon. You've unlocked the second augment, Falconer's Feast which returns a portion of your health from damaging enemies with Rakk Attack! Be sure to add this as your second action skill augment. Also you have a new pet evolution, Spiderant Scorcher, giving you 10% bonus elemental damage and your pet the ability to burn nearby enemies. Swap out the Spiderant Centurion for it!

Hunter Tree - Levels 18 - 22

For the 4th tier, spend 3 points into The Most Dangerous Game for solid bonuses upon killing a badass enemy, also it adds extra cash rewards too. Spend 2 points into its neighboring skill, Big Game for the Hunter skill bonuses. Replace Rakk Open a Cold One with the new augment Flock'n Load to send in 2 additional Rakks, totaling to 4 Rakks at once! Also you have a new pet evolution, Spiderant Countess, but Scorcher is more beneficial with its AoE aura.

Hunter Tree - Levels 23 - 28

For 5th tier, replace the augment Falconer's Feast with Rakkcelerate for an extra charge and 20% cooldown rate. Spend 1 point into Galactic Shadow, giving you 15% more critical damage and less aggro from enemies. Next spend 1 more point into Big Game, then 3 points into Hunter's Eye.

You have finally reached the capstone for this tree! Megavore is much more powerful than it seems. Megavore can crit with rocket launchers, grenade launchers, flamethrowers, atlas and torgue weapons where as opposed to without Megavore, you cannot. Also, You will be able to crit enemies without critical spots or very small/hard to hit critical spots. Lastly, this capstone synergizes very well with Head Count and Leave no Trace, giving you much more ammo regeneration and cooldown reduction.

Stalker Tree - Levels 29 - 33

It's time to switch over to the Stalker (green) tree. For the 1st tier, maximize 5 points into Furious Attack, giving stacking bonuses to damage and handling when shooting an enemy. Keep in mind you should keep Rakk Attack! equipped.

Stalker Tree - Levels 34 - 38

For 2nd tier, spend 2 points into Eager to Impress for further cooldown reduction upon each kill. Spend 4 points into Overclocked for higher fire rate (with Two F4ng, your RPM should be through the roof!).

Stalker Tree - Levels 39 - 43

For 3rd tier, you should equip Fade Away including the two augments: Guerrillas in the Mist (removes the maximum shots during action skill) and Not My Circus (focuses all aggro on pet). Put 1 point into Lick the Wounds for the ability to be revived by your pet. Spend 3 points into Turn Tail and Run for improving survival while on the move and damage while holding position.

Stalker Tree - Levels 44 - 50

For 4th tier, spend 3 points into The Fast and the Furryous for solid gun damage and movement speed. Next, put 2 points into Eager to Impress. 

For 5th tier, you've unlocked the boss slayer augment Unblinking Eye that replaces Not My Circus. This augment potentially gives you 225% extra critical damage, including 50% critical damage from Guerrillas in the Mist. Combine this with your insane RPM and other critical bonuses. For the last 2 points, Rage and Recover gives a great value for the amount of HP regeneration.

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  1. This article is great and helped me during playing fl4k, thank you for that? But what about above level 50? The current level cap is 72.

  2. This is really good. Thank you. However, your tiers are slightly off. For levels 34-38 you allocate 6 points, although there are only 5 to distribute. For levels 39-43 you allocate 4 points, when there are 5 available. So. for 34-38 you should say to put 3 points into overclocked. Then for 39-43 you should say to put one more point into overclocked, then continue with the rest of what you said for that tier.

    1. OOPS, nm, I was confusing your tiers.

  3. With Guerrillas in the Mist being nerfed, does this guide still hold up?

  4. Why on earth would you go for Megavore over The Power Inside (Stalker final point)?! Megavore gives you a 20% crit chance on none weak-points only, which means it’s worse the better you are at aiming for weakpoints, *and* gives you utterly zero value at all during Fade Away, the entire focus of this build. The Power Inside, on the other hand, gives you a 25-50% damage buff for (nearly) the entire 16s duration of Fade Away.

    Also, this is a build focused on critting and on using Fade Away, yet you didn’t max *either* of the two cooldown reduction skills (Eager to Impress (Stalker), which you have at 4/5, and Head Count (Hunter), which you have at 2/3). Max those out and Fade Away comes back that much faster, which means more time spent in your god-mode 100% crit +50% damage spree mode.

    Actually, same thing for Hidden Machine (also in Stalker). 5 points gets you +36% damage when you’re not being targeted, and during Fade Away, you’re by definition not being targeted. Instead of that, you opted for a mediocre fire rate skill and 2 points in one of the worst regen skills in the game (Rage and Recover, it only lasts 3 seconds on kill and only restores percent of *missing health*, not max health).

    Y’all are missing out on huge optimization opportunities for this build.

    1. Hey so, the ability is very useful for weapons with multiple pellets and what not so its not bad, also if you hip fire your weapons have a spray making it harder to hit vitals so it would help. it dosent take away your ability to hit headshots either.

    2. Do you have a picture of your skill tree you can send. I would like to test out your build instead of this one

    3. If your using megavore with a ricochet/ammo returned back to mag weapon like you should be combined with your return ammo on crit chance. All those bullets that ricochet and get crits also add into that. So when they ricochet hit random targets they have a higher chance to be a crit chance with MEgavore. So when I am firing my 60 capacity mag for lucian’s call and I go into fade. Just massive crits all around the screen my mag sits at 60 the duration then when I am out of it my crits everywhere they land reducing the cool down time of that fade means more fade more heavy damage. Plus on a good streak I never have to reload. Once I pop fade my ammo count starts climbing back to full. So better sustained damage over time rather than burst.

    4. Hi, so not sure if you’ll be able to help, was going to do this build as want to start playing but read your comment and now on the fence. Do you have a fl4k build as looking for something to use that’s really good for dmg and survivability

  5. In my experience, for solo play, investing into the Stalker tree first is way better, your damage will take a hit, but some bosses in this game don’t spawn many enemies for a Second Wind (Truant and Killavolt come to mind, not to mention Truant has a resistance to Fire and Cryo, if you don’t have good gear he might be hard to beat, let alone farm, and he is probably one of the best early farms).

    I’d spec into Stalker until you get Lick The Wounds and Turn Tail and Run, then fully focus on Hunter, and finish with the remaining Stalker skills, this way you get to use Fade Away earlier as you’d have unlocked the first two augments, making any Jakobs shotgun great for crowds and any Torgue shotgun or assault rifle great for single target damage, making you less reliant on legendary gear.

    1. actually there is a hidden buff w megavore i’ve tried the predator dps tank build from a different build website didn’t notice that much difference in dps etc ✌.

  6. Just hit level 46, found this and tried it out. In the great words of the Slab King himself, That. Was. Awesome! I’m using a spinnigun with overkill fire rate as is, and even in mayhem 3, I eat through badass fanatics within a second or two. Awesome guide, more or less what I had been doing with a few minor changes.

    1. So, what gear is recommended for this particular build? I haven’t had time to play much but the information would be greatly appreciated!

      1. Yea i would also like to know especially which class mods are recommended.