Lunomica's Arbi build :)
 Arbites Build - Warhammer 40k: Darktide 

A few notes:

- This is the build I always play on Arbi in havoc, meant to be an all-rounder that can handle any situation decently well, with a focus on frontlining and team supporting.

- About Last Guard: this blessing only comes into play once every few games, but when it does, it's a game saver. When surrounded by elites / a mixed horde, in-between attacks, you can use the Branx Mk VI Shock Maul and Suppression Shield's special for very strong AoE stagger; when the shield runs out of juice, you block to defend yourself and replenish the juice; and, if there are so many enemies that your block gets broken, Last Guard gives you some extra time; then, when the enemies get back up, you will have one special attack charge back up to stagger; and, when the enemies recover from that, Last Guard will be back up.

What this means is that, as long as you manage those two things well, and use your dog and/or your shotgun to take care of specials, you can virtually never die to hordes and elites, no matter how many there are.

If someone reading this wants to give it a try, I recommend practicing it a little in the Psykhanium to get a hang of the timings :) (Use the Creature Spawned mod!)

- The Scattershot and Man-Stopper blessings on the shotgun mean that, if a special is coming from behind a horde and/or elites, you can just keep shooting and the infinite cleave will allow you to kill whatever's hiding (as long as you avoid shooting carapace, which can't be pierced).

- I micro manage my dog a lot, and use him as my primary ranged weapon, using my shotgun only when needed to save ammo (though my main focus is always melee).

- I can't make up my mind on Razor-Jaw Augment, so I go back and forth between using it and dropping it, foolishly thinking I'll one day figure out if it's worth the talent point or not. It helps managing trash mobs during mixed hordes, which can be nice.

- Execution Order, on top of the direct buffs it provides me, gives a lot of damage to my dog (which gains a lot of value since I micromanage him a lot), and gives a very strong source of cooldown recovery, which is crucial for me because I want to use Nuncio-Aquila as much as possible to support my team.

- I'm an eternal True Grit enjoyer. Similar to Last Guard, it doesn't come in often since (I think) my movement is good, but when it does, it often saves the game.

- I generally don't run revive speed on Arbi because I use Nuncio-Aquila which, with Inspiring Recitation, gives revive speed; and the other buffs/debuffs it provides (like TDR, toughness per second, slower melee enemies) make revives feel very easy as it is, even without revive speed curios.

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This is mainly meant to show this build to one specific person, but if anyone else stumbles upon this and has questions, don't hesitate to DM me on Discord (@Lunomica) and I'll be happy to help ^^