So you will want a spiked chained as your main weapon since it is finessable and you can use it as a two handed weapon. Furthermore you can move and attack with this base class similar to a dervish. Finally a spiked chain can change its reach due to its flexibile nature.
Remember if you take 1 level of Barbarian you can always charge with pounce all the while still doing your gemini dance.
I am thinking this class will combine well with barbarian and fighter for a tripper build. Whirling Frenzy Barbarian, Gemini Dance, and Haste gives you 3 extra attacks per round not counting your BAB. Gemini Dance boosts your Dex so you get 2 extra AoO when you trip someone. Barbarian boosts your strength, and Fighter gives you the feats that you need.
The problem is that the class has multiclass restrictions. Its irritating that someone would put these on after the fail that was Monk and Paladin, but its there. I was also thinking about how amazing Robilar's gambit would be, as it is so easy to get your Dex high with this class. So it's fairly feat starved if you want to do something fancy, and I feel like a couple of the dance styles are underpowered (the elemental dances, which only give some resistance and 1d6 bonus damage).
Round process with Spiked chain:
1. Dance, Time Stop (get into position/drink potion, wrap chain around opponents legs), Full Attack (with +2 # of attacks) trying to trip as many as possible, activate Gambit
2. Rack up the AoO, putting as many on the floor as possible
3,
4. PROFIT!
Pounce works better with other Styles (Lunging Leaps). I think if possible, a little Stormguard warrior would allow her to nova on the second round.
Q: The second part of Stormguard Warrior allows you to rack up a bunch of melee touch attacks to boost your real attacks next round. If you were to time stop (where you can't attack) and use all touch attacks against your opponent, when do you get your damage bonus? The round in which you time stopped, or the next round? Or is it incredibly munchkin to make touch attacks against an opponent who you can't regular attack?