As a Sch on WD at the start of the game i cast Adlo at 10 sec before the gates open on all of my team players instead of just doing succor. I always save my purification for when i get full swing by the tank. you have to keep running away from the dps and reapply adlo on yourself as long as you have adlo you can cast without getting interrupted if you do get interrupted use surecast and than adlo on yourself if your ally needs healing cast physick or lustrate. I mostly switfcast or use equanimity to use succor if i need to do some aoe healing or use the fairy aoe. I always use Eos and place her in the middle of the area at the start of the match, if i see that my fairy gets attacked i put her back to follow or when i see the enemy team has a smn, cause smn can put dots on your fairy and bane. When casting make sure you stop than cast adlo on yourself, most of the time when you run you will get interrupted cause you pressed your skill while running so make sure you stop before casting.