From what I can gather:
All comboable skills (skill 1, 2 and the single target one that targets any rank) apply 1 delayed hit of lightning upon finishing combo; skill 1 is weak but short combo (easier to land the whole thing), skill 2 is longer stronger combo, the ranged one marks on first hit and pulls target to front on second hit. Skill 1 also self-buffs a bit of spd and dodge (on 2nd hit), while skill 2 iirc gains armor piercing on later hits of the combo.
Lightning field is bread and butter, it applies a damage over time to front 2 ranks (small lightning vfx), and makes final hit of skill 1 and 2 (and maybe lightning strikes?) stronger.
Use last skill to bring her back to front, or to reset acc debuff once you no longer want to try your luck swinging at things. Simple.
Virtue (100% chance) increases her acc slightly and substantially increases stress dmg taken (ergo it'll only last for a few attacks), but it also makes her attack stronger and I THINK it adds an extra (big) damage instance to her skill 2 combo finisher (this doesn't show up on attack dmg preview). Or maybe that's from using the finisher on a target with lightning field debuff. I'm not sure.
All in all, she can put out some serious damage on enemy frontline (though she practically wastes an extra turn whenever she misses). Her dps is strongly focused on enemy rank 1 though, so expect her to trip over corpses quite a bit. When corpses are getting in the way, the recommended response is either using the ranged skill to pull a different enemy to front, or just hit corpses until she pops a fresh virtue bar then use the acc reset skill to "pass turn" while the rest of the party clears corpses/pulls enemies.

You mentioned Stress cleansing? Like just dropping some of the stress she built up? Where is that? Just in getting virtued? Because I tried using her and was immediately put off by how quickly she builds up that stress.

Originally posted by Malzahar:

You mentioned Stress cleansing? Like just dropping some of the stress she built up? Where is that? Just in getting virtued? Because I tried using her and was immediately put off by how quickly she builds up that stress.

She has a 100% chance to virtue, She also does not heart attack, upon reaching 200 stress she just resets to 0.

To follow up on the above: It would appear her skill 2 finisher changes to a stronger version (seen on her profile as the skill named ???) if after she lands the last hit of skill 2, she is not in virtue but still has floating swords out (this appears to be some kind of hidden offensive buff that triggers by landing any hit while in virtue, and lasts until you use acc reset skill). Given her massive self-stress damage though, it'd be pretty hard to time this without a lot of stress resist. At the very least, it looks pretty cool.

Edit: Actually, given that the ??? skill has bonuses while virtued, that probably doesn't make sense. Maybe you have to just have floating swords and be in virtue with 100+ stress when you use (and land) hit #4?

Originally posted by Rai "Economical" Taki:

To follow up on the above: It would appear her skill 2 finisher changes to a stronger version (seen on her profile as the skill named ???) if after she lands the last hit of skill 2, she is not in virtue but still has floating swords out (this appears to be some kind of hidden offensive buff that triggers by landing any hit while in virtue, and lasts until you use acc reset skill). Given her massive self-stress damage though, it'd be pretty hard to time this without a lot of stress resist. At the very least, it looks pretty cool.

Edit: Actually, given that the ??? skill has bonuses while virtued, that probably doesn't make sense. Maybe you have to just have floating swords and be in virtue with 100+ stress when you use (and land) hit #4?

After Extensive use of the character, Ive Found her to be a great character to deal with stress in a dungeon. Every time she Virtues a Party stress heal will go off, Combiine that with Mobs that focus the highest stress Character and it is realy beneficial to stack stress on her as much as possable. Allways try to Bring a character that can guard her tho! She is sqwish City. Between that and her being in the Front, you have a character that is extremely likly to die. The man at arms is Prefect for this as The Dodge Buffs to help agisnt Aoe and the guard Makes her shine! It takes some skill to use her as a better jester as you gota know when the best time is to cast guard on her, Otherwise your just gone get Your guard character Stressed to death. As far as damage goes, If you want good ammounts of it you need to buff her accuracy a bunch, In which she can annilate what ever is infront of her.. But it takes alot of buffs from varios sources to achieve this, Not what id personaly Focus her on, Her damage and stress healing is more then adequate When you dont. the only time using her in such a way is REALY beneficial is agisnt bosses, Ive done over 100 damage with her on a single turn, Tho this takes alot of buffing, luck and timing to pull off.