I appreciate your point about people messing things up regardless of the healing comp, but when my AST healer asks for help with regular tank healing because he doesn't have the MP to keep up with it, there's a big problem. In addition, there's realistically very little in A1 to mess up as a DD. Get your mob into position in time, pop keen flurry when you get prey. If you get hit by anything avoidable in A1, you simply die.