White Mage absolutes?

[Menae]

This made my stomach hurt because I hate using ACN, but now I'm doing Coil and there is no avoiding this sigh ._.

You don't need it. I killed Twin for the first time without it (or rather with it but I forgot to use it, because I'm super good at using my CDs). You can get by without it, particularly if you have a SCH and SMN in your party.

That said, might as well - once you hit 30 and do the sch quest healer queues are pretty quick, and while it might not be NECESSARY, it certainly can help - it's great during snakes and while it's not enough to skip a set of tank cooldowns on death sentence, it gives you a little more buffer in case Twin gets a high DS or somebody misses a shield.