My idea is make berserkers attacks non-counterable like from other Predators. This will make sense to take him for mellee rushes. Right now Berserker cannot do much in close combat if he faces good knife countering FT team. He have low stamina so after 1 long jump and hit combo he cannot jump away and become big fat aim target for FT
Hunter>Elder
Idk… I use scout all the time. I have 87 pred (basically a hunter) but when its 3 or more PC FT I go with scout - better chances of at least survive the match.