There is one crippling immunity that renders this class powerless against those who have that trait, immunity to mind affecting abilities. Since most of their abilities are based in mind affecting they should have some way to deal with them if caught alone, this is about the only flaw I see with the class as their seemingly as both my friend and I see it the most underpowered class in the book.
What if any ways can there be to get around this besides allies, physical abilities, or other non mind affecting abilities can they possibly get to circumvent this?
Quote:
Psychic Inception: The hypnotic stare and its penalty can
affect creatures that are mindless or immune to mindaffecting
effects (such as an undead or vermin). The
mesmerist can also partially affect such a creature with his
mind-affecting spells and abilities if it’s under his hypnotic
stare; it gains a +2 bonus on its saving throw (if any), and if
affected it still has a 50% chance each round of ignoring the
effect. Ignoring the effect doesn’t end the effect, but allows
the creature to act normally for that round.
This is the only way around it, however it is still very risky and chancy to even succeed, so overall I feel this class can be improved because of that flaw which is partially addressed.