Just make sure to balance DPS and healing spell use for the most part, but.... I only tend to use AST & WHM, BTW...
WHM is the template HLR with high-output healing and damage spells with a tendency to leave most players extremely bored
AST is a fortune teller with great mobility and options between either being shield or regen focused. The card mechanics are not very comfortable for controller set-ups right now, and it's basically a weak buff-bot with an attention trap and a frantic playstyle and weak healing. It's mostly just spamming Benefic II frantically on extremely undergeared tanks, atm...