
Desidero |

I think Tetori might be super fun, if not entirely optimized.
First you poop on their CMB/CMD with Enforcer Rime Frostbite, then when you're all done with the foreplay you give them a nice big Shocking Grasp charged hug.
On the Magus side, Hexcrafter might be really fun for taking advantage of Hex Strike. You could even go Hexcrafter/Bladed Scarf Dancer to retain the Int to AC.
Flowing Monk is another possibility. The sickening from Redirection will inflict a juicy -2 to saves. Combined with Enforcer and Hex Strike Evil Eye (if you choose to go that route) that's a total of -6 to saves. Flowing Monk also gets even more dodge bonus to AC, so you could potentially have twice your Wis to touch AC.
Also check out Hungry Ghost Monk and Drunken Master for easy Arcana regeneration (thanks to Ki Arcana) and crit fishing synergy on the Hungry Ghost side.

AndIMustMask |

something that trades out flurry, to be sure (since flurry and spell combat dont stack).
consider MoMS+hungry ghost for dragon and kirin styles (all-purpose), with elemental fist (after you get dragon ferocity, so EFist scales like a 4 winds monk's) and that water/ice style for elemental fist (i forget the name) for punchy-fisty builds.
something like a black blade or hexcrafter magus paired with a hungry ghost monk for a more weapon-focused build (with a scimitar or katana) would be hard-pressed to run out of ki or arcane points with arcane ki from all the crits they'll be getting (crit, regain a ki, treat that as an arcane point if you need it).
an unarmed build would still make great use of it despite the reduced crit range, but the ki leech qinggong trade-out might be an easier option for them.

Aenanlron |
go with the trip line, improved trip, greater trip, vicious stomp, and tripping strike. Max out your crit fishing and AoO's at the same time.
Tripping strike gives a trip on crit if confirmation roll exceeds targets cmd. Greater trip gives an AoO for tripping, and vicious stomp gives an unarmed AoO for someone landing prone near you. I think you would technically even be able to add the +4 for trip and greater trip to the confirmation roll to compare if you beat their cmd.
MoMS and Sohei are great ideas. go with kirin style and panther for the free attacks against anyone you provoke an AoO from while moving.