rexo and kamishogun may be easy to take down, but they are easy to set up too and one kill which they can use sudden death for to charge bloodfury is really good as they start sweeping after 1 kill
They paint a massive target on their head. You can’t build a team around them because of sudden death. Any enemy worth their salt will kill them off as soon as they enter the field.
and if you don’t take them out either time strike or sudden death will charge them and they destroy, granted sudden death usually ends up killing rexo or kami