What level are you?
This is by The Walking Carpets guildmaster, it is for a Sage, but other than names it is the same thing. Other than Mav, Seijin is who I listen to most about gear and game play.
Surge - "Increases Critical Multiplier, causing more damage or healing with a critical hit."
Alacrity just speed up the cast time, but it does not increase it significantly. I just don't find the difference between 1.7 seconds and 1.5 seconds to be that big a deal, but the difference between a 3800 heal and a 7890 heal to be more important to me.