She's support, play her on full AP, and you'll rule if you learn to play her, she's totally worth it, i love the champ, if you got question ask.
Passive: Increase AP when HP lowers.
First: Throw blades, doing HUGE damage on low levels, and on higher aswell. If you use mantra before using the skill, she'll heal herself + all alliances infront of her.
Second: Does a tunnel with an enemy/ally, when it's alliance, it speeds them both and anyone passing the line gets huge damage, if it's enemy it slow him.
Third: Shield, absorbing high damage, when mantra apply it does huge damage.
Fourth skill is actually the mantra, it has like 18 seconds cooldown on level 1, goes low to 6-8 at level 18, basically you have it all the time in battles to heal and so on.
She hasn't ultimate, but her skills goes up to level 6 instead. I play her with Clarity + Ignite. Magic Penetration runes and 9/0/21. That's pretty much it.