Unneeded Role

Mage, you can use summoning magic too?

It's a warrior-type monster who's proficient at tanking and melee combat!

Heh, sounds reliable.

Panzer Hodor

Mage's magic damage, Priest's heals...

...and a summoned monster for tanking. With these roles filled, we have no weaknesses.

Wait... am I not needed?

Slayer? What's wrong?