PT and get her to start as tank. New player to mmo learn pve mechanics better as tank. She can always switch later to dps if she doesn't like tank. Needless to say PT is pvp-friendly.
Stealthy class. She assassin, you operative. That combo can clear all H4 and FP without waiting for 4 people group, and is super fun for pvp.
And tell her dark side has all the cool looking gears