I always cheese PF ilvl requirements if I know I can do the job. Just put on high ilvl gear from your other jobs and join the party then quietly slip on your healing gear. On my WHM I started going to T4 with ilvl 73 (which is already overkill really). Don't do this if you're actually new to the fight though. I usually MT T4 and have done it ad nauseam so know the fight in and out.