For me that’s easy - magna. Hands down.
Can’t be distracted, can’t be slowed down, can’t be blocked, can’t use dodge, can’t use RTC, can’t stun… add boosts to that mix and you got a dumb little slug that rips through most everything. Oh, and let’s not forget that it crits way more than the 20% stat leads you to believe.
So, what creature do you think boosts unbalance the most?
Not that Ludia gives a rip about balance anymore. Oh wait, there is one balance they REALLY care about - their bank account balance.