We had another campaign hit level 20.
What level 20 feats do you take and why for:
1. Ranger
2. Fighter
3. Wizard
4. Cleric
5. Psychic
6. Champion
Any other classes you want to toss some ideas in for feel free to add.
For wizard, 3, how do you pass on Spell combination? An extra 10th rank slot is fun, and Spell Mastery's 4 extra spells ranked 9,8,7,6 is an extra power word kill, stun, blind and heightened slow a day, which will get a lot of use, but none of those have the wizardy vibe of spell combination as a capstone wizard feat.
For Psychic, 5, Mind over matter is probably the most practical for such a slot starved class, but Become Thought is so cool narratively and thematically. Unlimited potential and Automatic Psychic Action would be really cool if Unleash Psyche lasted more than 2 rounds, but since I know your fights are rarely over in 3 or less rounds, I think they both rule themselves out being tied to psyche actions.
For Fighter, 2, so much depends on your build, but knowing your playstyle I can't see you passing up Boundless Reprisal. It is just so exploitable with good team work.