I wish more people would experiment with moves when they first get them. I spend time at the fc house experimenting with what effects what when unlocking a new ability.

But for Diurnal Astrologian and White Mage, Synastry>HoTs or Divine Seal>HoTs is one of the most basic way to heal in dungeons and raids, kind of makes you wonder how they havent figured that out by lvl 60. Mind you, i still see D.AST and WHM in DF just flat out not use any kind of HoT.