Doing this fight on scholar is all about timing. Your main job is dmg mitigation on the tank. The biggest dmg is from plummets and death sentence. Plummets occur roughly every 10-15 secs. Death sentence ever 30-35 secs. You mainly need to focus healing up these two bursts of dmg. Plummet a simple physic will do the job. For death sentence a simple ado then followed by a lustrate will do the job. Even that is debatable if your whm is on their game you don't even have to lustrate after a DS. Beyond those heals for most of the fight I rely on rouse and fairy heals. Snakes is probably your most heal intensive time. For fairy the only thing I can say is that I find Selene much more useful. You can do with her whatever you like to be honest. I prefer placing.