Masters of Orendi, what helix choices & gear do you use on her?

I'm thinking about picking up Orendi, but can't determine what gear and helix choices are best on her. So far, I've decided that I'll use the following gear:

Slot 1: +Skill Damage, +Max HP Epic

Slot 2: +Max Shield Strength, +Skill Damage Epic

However, I can't determine what should be in slot 3, or what helix choices to pick.