General veers

Against a player, it is not. In the attacker's challenge, yes it is. There are a lot of "bosses" when you play against the AI that have different skills than normal

Oh ok so it s not useful to start farming him then

You mean the challenge? Take the droids first to give your team a buff, and make it easier to take down the main two. You have to be quick or the ability lock will wear off and they'll 1 shot your entire team.