Hardcasting Flare on a single target is a DPS loss in most cases. Swiftcast + Flare then Convert can be a slight DPS increase compared to a normal rotation. Flare take all of your MP and you would have to Trans to get UI I meaning you'll have to wait quite few seconds to resume casting when you can just cast Blizzard III and get back to your rotation quickly after few ticks.
PSN:fooshen Currently playing: Dragon's Crown, Tales of Xillia, FFXIV
For a boss, which would be better - using Bliz 3 and Fire 3 to swap between MP regen and nuking modes, or using something like Bliz 3 to gain 3 stacks of Ice affinity, then using Flare when at full MP, then keeping the three stacks on with a single Blizzard spell every so often until you're full again?
I don't have Flare yet, but I want to plan ahead. I've noticed I don't use Transpose much now that I have Blizzard 3 and can get 3 stacks of an element - mainly after a fight's over and I'm still in Fire mode, or if I don't have enough MP to cast Blizzard 3 after blowing MP on Fire.