Originally Posted by
Archwizard
Unless you do any level-synched content whatsoever -- Roulettes, FATEs, etc. Cases where you don't have access to Flare and are forced to reach back into your spellbook and pull out Fire II again. It's only "useless" after a certain level range, you still have to account for any time you go back into that range.
Just as an experiment I tried macroing Blizzard II onto the same button as Freeze (Freeze having the higher priority) to simulate the same thing, "only cast Blizz2 when I don't have Freeze such as in synched content", and there were random intervals where the macro would just skip right past Freeze and cast Blizzard II. No rhyme or reason to it -- target was selected, but weird timing with the GCD caused it to queue up the bottom spell in the list instead. Yes, I know, just another reason not to use macros, I deleted it and moved on with my life.
Kind of a big reason I advocate combining Fire II with Flare and Blizzard II with Freeze though, since most jobs no longer have to do that kind of thing with their own ranked abilities. Big contributor to button bloat.
Not to mention that with BLM basically playing like a different job every 10 levels, being a bit more forceful with phasing out tools we don't use at level cap can be highly beneficial to both veterans being downsynched and new players learning the job.