As far as tips for your class go, I got nuttin' lol. I've always played healers or tanks.
Coil in general - Deep breaths when you've wiped on T5 for the millionth time. T1 - 4 really, you'll be through them so quickly you'll wonder what the fuss was about!
T1 - Be ready for the split on the boss
T2 - I've only ever done enrage tactic (means the last boss uses one attack over and over) so the fight is pretty much on your healers (a bard helps wonders!). Failing having a bard there, have your healers set up a macro saying "i've just used medica" or whatever aoe, then you're other healer knows it's their turn to cast, it really helps with mana for white mages, as it's the usual killer on that part.
T3 - Skipped it, i should really go back and do it at some point.
T4 - Honestly no idea xD I got lucky with the group, stayed near our groups other healer, and just hoped
T5 - This is where the challenge kicks in. Be ready to wipe, take it on the chin, and just enjoy some difficult content! (I'd reccomend a video on this one at some point, lots of things going on).