Quote Originally Posted by SahreeYurblu View Post
Fire i is faster so if it's a quick kill trash pull, it can be faster to single shot. Let's say I target something and cast fire ii.... and now it's dead before the casting finishes. I tab to the next target and fire ii... and that one's dead before it finishes. In those cases, I single shot those.

Adds on a boss, sometimes that's single shot because I'm low on mp and don't have the time to transpose and blizzard but I can land a single shot.

I'd be all aoe all the time on 3 or more if I could, but there are times singles are more effective.
Best tip for you is to target either a) the biggest mob with the biggest HP pool or b) whatever the melee dps is not focusing to start your AoE.
As for MP effectiveness it's generally more effective for damage per MP to AoE, despite that you lose more MP per spell and faster. Further to this idea, it's more time efficient to AoE despite your running out of MP faster and the first mob takes longer to die - as the DPS is higher and thus the mob pack dies faster. This is evidenced by basic math where DPS = damage / second, and the mobs have a set health. Thus, increased damaged / second decreases total time.

I am not suggesting a BLM should never single target, as it has it's times when it's better (i.e. a boss fight, no doubt), but I was simply countering your points as to when it's useful to single target. Mostly, I was just trying to provide tips as it appears you're still learning your job as a lvl 16 THM.