It's an interesting thread, even if it's hypothetical. Personally, I went with Power first. I prefer a steady stream of bonus damage, and fill the role of emergency healer in my squad. I do not often pull aggro away from my tank and seem to do good damage at my current level (35). That said, wouldn't it make more sense for me to stack up the critical when I'm solo? I neither am healing nor trying to help my tank. (My companion is not a tank). My plan is to stay with power until 50, then build a second suit for critical and see how they compare. On the topic of alacrity, this thread has convinced me to stay away from it, even with my emergency healing.