TACAXE Kills
 Hive Scum Build - Warhammer 40k: Darktide 

Most important - use your stimm ASAP until you reach max stacks of Chemical Dependency . All we need to do in combat - spaming light atack(trying aim for heads) and dodge.
1)You can swap Maxed Out Chems to Alley Rat , Toxin Mania or whatever you like. You gain less bonuses, but can add to stimm 3-4 more points.
2)For stimm i prefere  Spur IV+ Wildfire II + Kalma I (Fastes attacks = more attack = more damage and more crit hits) , but Wildfire V or Vultoprene II good too. Anyway, general rule - cooldown needs to be less then 45s.
3)For axe - you can swap Agile(but its good "defence" option that gives to us unlimited dodges) to Brutal Momentum or Shred (but you will have enough crit chanse even without it)
4)Use needle pistol to kill crushers or snipe snipers/bombers/netgunners and to quickly and safely close the distance with the enemy.
5)I dont know which is better - Hyper-Critical or Hyper-Violence, but afaik, even though were critting with at least every second hit, human-sized enemies arent much of a threat to us anyway. At the same time, chaining kills through Hyper-Violence lence lets you ramp up your damage.

This version is more "safe". For now, i prefer more "damage" - i exchange Street Tough on Toxin Mania and Slippery Customer on Virulent Strain 
The other talents are also worth looking at for this build: A Tertium Welcome, Cheap Shots, Battering Strikes and Battering Momentum, Alley Rat or Nimble, Jittery(if you replaced Agile on axe with something else)