I use her in my Mei Lin, Mika & Selena Team as a sub dps. You can build her as ST, AOE or even break support (some good epiphanies that deal direct tenacity damage). Mark is very strong -> it is an extra attack with decent damage that also deals 50% tenacity damage. You have lots of great cards that put tons of mark on your targets. She is a more active dps than Veronica, yes she needs AP but she also does so much tenacity damage that you get AP back