Originally Posted by
Reivur
I mean to be fair that's a typical, cynical response a lot of MMO players will give, but in the case of BLM this is a literal thing. BLM's rotation changes around every ten levels so the 'true' rotation you're going to be learning is barely similar to what you're doing. Blizzard 3, for example, is a game changer and then transpose suddenly stops being used entirely outside of conversion after a Flare, running from point a to point b in between pulls, or maybe snapping into for mana regen if a Primal or boss isn't able to be attacked like Ifrit Rushing. Or just outright correcting a mistake.
Similarly there's a tricky Piety spot you want to have that's racial or bonus point dependent to be able to get an extra Fire 2 or not in a rotation. Moon Cat, for example has it, but a friend of mine who's Sun Cat puts 28 int/2 Piety because BLM gear doesn't have Piety to make up this deficit to get that one extra Fire 2 before going into Ice again.
There's also debate that your first Thunder cast should be Thunder II instead of Thunder III due to cast time differences, but some people who feel they're 'unlucky' prefer to start with Thunder III on pull instead of hoping for an early proc, or use Swiftcast Thunder III on Single Target fights since there's no need to hold onto it for Flare without an adds phase.
Content just doesn't really demand memorizing the optimal path for every level sync, and its difficult to care when you want to have good habits for your 50 play-style. BLM is pretty much the only class I've seen where spells can replace spells. Its odd. I mean some classes have skills that 'suck' and may be only utilized in pvp, but Thunder I (and II depending on some people you ask) is just something where you go "Nope, done with it for life." even if it was practical at the time.