Learn how beat such characters. Also, such characters are only good for one thing, the rest of the time they're terrible. If you can't do that, you're a terrible GM.
Currently I'm working on each of the races and classes in the City of 7 Seraphs. So far they're not that bad. Typical Akashic/ Psionic classes. Their Shadow Weaver class I find is better than D&D 3.X's version. However, I'm not a fan of their Theurge class yet, others have done it better. It sucks that the book has nothing in terms of a bestiary, but I believe someone else is bringing out one that fits for planar campaigns if I recall correctly.
A few more months there should also be new Mythic books coming out from Legendary Games, it's too bad they didn't bother to address some of the issues with Mythic rules and just made things worse with their own mythic feats. (There's a reason why Mythic Metamagic feats weren't supposed to be a thing.), but I have faith that they will be quality products.
I should mention that City of 7 Seraphs doesn't have the typical artwork found in 3rd party books, a lot of the artwork is pretty high quality so you get what you paid for when it comes to a book that's over 600-pages long.
On to non-Pathfinder games.
I've been trying to read the Invisible Sun books from Monte Cooke Games but just can't find myself doing so. They're going out of their way to be a SJW book.
"As we agree with the growing consensus that “they” can and should be used as a gender-neutral,
singular English language pronoun when one is needed, we have adopted that as the style in our
products. If you see this grammatical construction, it is intentional."
So fuck that system.
Currently now reading Solar Blades and Cosmic Spells, after that probably High Plains Samurai.