Busted Up gives you back some stamina every time you kill something in melee. It is a Tier 2 Melee skill that keeps you sprinting and dodging through long brawls with Swarmer packs.
Take it if you clear Infestations and small packs with a bat or machete. If you mostly shoot, spend the point elsewhere.
Hard Hitter and Home Run. Faster kills mean more stamina refunds, and Just Roll With It makes each roll cheaper.
Finish off weakened Swarmers first. Each quick kill tops you up before the next one reaches you.
Bull Rush
Lets a sprinting melee attack stun a regular human or a Swarmer.
Escape Artist
Lets you kill a smaller enemy right after breaking out of its grapple.
Executioner
Lets you stealth attack heavy Freakers, and kill heavy Freakers or large animals when breaking a grapple.
Field Repairs
Lets you fix melee weapons using scrap.