All depends on your style I have all 3 to 60 I tend to alternate between 2 the most.AST and WHM. SCH as sed be4 is a Jack of all trade. The WHM is pure healing power. As a WHM u are all about heals and HoTs. MOST people say that SCH is the best in dps. But a WHM dps is nothing to shrug off. AST is the weaker dps off both but with the buffs is not even something that is a impact.JUST make sure u learn and practice stance dancing. The only macro I use on healers are the virus,.eye for an eye, and the cleric stance macro witch will change your hotbar wen u switch on and off