What are some fun, capstone, level 20 builds?

[Roco]

My gaming group is going to run a one shot this Friday using level 20 characters. All Pathfinder material is legal, but no 3rd parties OTHER than path of war (which I know very little about but a few of the players really like).

I'm at a bit of a loss on what to play. I've never played a character past level 15, let alone level 20.

What are some fun classes to take all the way to level 20?

I'd really like to use capstone abilities if possible (that's the main draw I figure of going that far) so try to avoid multi-classing unless it nets some really cool and fun build to play or is like, a prestige class that gets its own fun capstone.

A few ideas I thought of was taking either Kineticist or Elemental Annihilator kinetcist to full 20.

Base Kineticist gets to become the Avatar at level 20, essentially getting access to all wild talents and abilities of all elements.

Annihilator trades that out to be able to do an insanely powerful Nuke of 5 elements. (and if I understand it right, using certain kineticist abilities will allow you to throw out 2 in a turn and they can be empowered. Ontop of that, I believe you can make them into a sword and the sword version can use vital strike which will double the damage yet again, I may be wrong but I got something like 200d10 in one round XD )

I was also thinking of taking a character I ran in the past to level 12 all the way to 20. A wizard. There's nothing complicated about progressing them to 20 other than getting items. Cus there's really only the "Immortal" capstone and you get level 9 spells (and I built my Exploiter Wizard to have ALL the spells, and spells cost half as much for him).

It's not a flashy capstone but level 9 spells could be super fun.... but that might be TOO much variety for a one shot. I would probably want something quick and simple, not overly complex.

Thought maybe taking some class that gives an animal companion then going into Mammoth Rider up to their 10th level, ride around with Gargantuan and possibly Colossal sized mounts. That would be a pretty silly and fun concept for a one shot.

But ya, what are some fun ideas you guys have for level 20 characters?

[Dαedαlus]

Well, you came in at just the right time, with the new capstones and everything. So now, your Wizard actually would get a true capstone! Your best bets there would be getting +8 to INT, a Familiar with 12 spell levels of SLAs, or an absolutely absurd number of low-level spell slots.

Personally, I once had a level 20 Arcanist, who, through use of an exploit that granted her unlimited arcane reservoir, could cast infinite spells. I also took magical lineage on Time Stop. That was fun.

But, since you're not too keen on 9th level casting, here are some options:

You mentioned Kineticist, which is a good option. They deal truly absurd amounts of damage, and the base kineticist has amazing flexibility at level 20.

There's also Vigilante, who with enough setup (5 rounds of studying) and a Vorpal weapon, can insta-kill anything that needs a head.

Fighter, with the new Veteran of Endless War capstone, can get an absurd +7 weapon and armor training bonus, which when combined with Advanced training, can have some pretty great results.

Mesmerists are 6-level casters, but their capstone allows them to permanently Dominate a creature. It could be fun.

Druid, of course, gives you unlimited shapeshifting, if you felt like playing up that more than spellcasting.

Various Oracles have pretty great capstones (become a ghost, deal all the negative levels), as to various Sorcerer bloodlines.

[PossibleCabbage]

I am a huge fan of the Medium's Capstone.

Go ahead and channel the Champion, it's the most functional, but as a free action you can grab the intermediate, greater, and supreme powers of any spirit for 1 round.

Of particular interest are the supreme powers:
Archmage- 1/day, cast any spell on the wizard list.
Hierophant - 1/day, Miracle
Guardian- 1/day, straight up ignore whatever just hit you
Trickster- 1/day, natural 20 on whatever skill check you pick.
Marshal- Add 1d6 to any spirit surge qualified roll, for free, every round you use this, no limit.

It's not like the other spirit powers are useless either, of particular interest for a Champion focused medium are the Guardian (for DR 10/- and resist 10 for all elements) and the Trickster (surprise strike for 6d6, works for free the first time you hit someone in a day.)

[avr]

Shapechanger bloodline bloodrager could be fun. Given it's a one-shot you might never use the same form twice.

[Mysterious Stranger]

You may want to consider an unchained rogue. Their actual capstone is ok they also can get the level 20 skill unlock on a lot of skills. Some of those are actually pretty good. Essentially you get multiple capstones at 20th level.

[David knott 242]

I would second Daedalus's suggestion to take a look at the capstones in Chronicle of Legends.

One nice thing about playing a cleric or a wizard is that according to Chronicle of Legends they didn't originally get a capstone -- so for them, the new capstones in this book are potential add-ons, not alternatives to a standard class feature. You can pick between the capstone reserved for your class and the more generic capstones available to many or all classes. There are some really good choices there.