I think this was some sort of "block" so the gold tier players scores would not go through the roof when building up points for LB. I can't find any better explanation for Helena's extreme armor/HP - the boss scaling goes like [easy] - [easy] - [hard] - [medium] ([Herond] - [Europhex] - [Helena] - [Ursoth]). Don't change the damage, decrease the HP/armor so it's not boring.