this truly was a combat initiation.
only took like a couple hours worth of tries.
not proud of that captain kill but i'd rather win.
ive had decent success with the following 2 loadouts, maybe you should try them?
sword + slingshot, upgrade to scatterblaster wave 10, upgrade to katana wave 20, purchase rocket launcher wave 25.
battle armor/stratobloxer/borga, regen coil/battle armor/borga
sword + paintball gun, purchase timebomb wave 5, upgrade to firebrand eventually.
battle armor/bloxy cola/regen coil, battle armor/bloxy cola/chezburger
ALWAYS GET SURVIVABILITY GEAR (except stratobloxxer because it's insane)