I think I'm the sixth person to get the badge after the update cam out cuz before I checked the badge i kinda do a lot of stuff then I came back to check the badge there was like 23 people who got the badge I maybe wrong cuz i don't remember that well
Nah bro you can't do that it's the same skill but different set the set 1 head detach have longer cooldown than set 2 the smaller one it might be possible if you use set 2 head detach and wait for the cooldown and then change to set 1 and use head detach but I think it's not going to be possible cuz the head might despawn before you use it again
I recommend using titan and ya kid 4 titan 1 ya kid and other three I don't know cuz I beat this mode with 5 people And Ya kid is the medic don't him put in a fight