no, and even if they did it's hardly the same. spell cooldowns are ~8-15 seconds. WS cooldowns are 30/45/60/80. and even more troublesome is the fact that a combo action which ignores defense requires a combo in the first place, which means 1-2 actions preceding it which are dampened by the melee defense. and then what do you do in the downtime, be useless?
but seriously, on what planet are you calling fire spells useless? fire spells are the primary reason BLM is capable of 170 dps on MM, and the primary reason why they tend to thrash every other job in burst aoe situations (ie: av/cc trash). freeze is primarily for the enmity drop, yes, but the damage-to-mp ratio was so nice that it should be factored into an optimal rotation regardless.
no, but blizzard is perfectly fine to use as filler if thunder and thundara are on cooldown. as i've said multiple times now- dps comes from your rotation, and optimal rotations maximize actions per minute. that means limiting any dead space whatsoever. you should never not be doing something.
nope, but it's the bulk of your damage for sure.
then why would monk use fist of fire rather than fists of wind? if fire isn't a weakness, then monk would stand more to gain from reduced WS cooldowns. but this isn't the case. *the entire reason* monk performs so well on mistress is because of fire. and why are you telling me to parse? are you forgetting who you're talking to? do you think our blms get 170 dps on MM from using thunder line? maybe i was unclear or for whatever reason you felt i was implying this was the case, but i suppose i assumed it was fairly obvious that MM is *very* weak to fire and that's why BLM and MNK destroy her.
that depends on what kind of damage it can do with fire, like with mistress. it also depends on secondary and tertiary functions such as aoe requirements (as blm was the strongest on-demand aoe class due to lower cooldowns and lack of TP- though this may change in 2.0) and sleep duty. if fire rotation does less than stellar boss dps *and either* aoe isn't necessary or sleep isn't necessary, then no, you generally don't bring BLM. and the weird thing about that is, there were next to no situations like that in 1.0.
you got me there. i don't remember and i don't care, because that content isn't endgame and is therefore trivial to us. that doesn't mean BLM sucks in any of those situations for whatever reasons, it just means we never did it or paid much attention to it so we can't really give you a definitive answer.
but again, it's strong in *most* situations and strongest in some. that's already more than we can say for warrior, monk and dragoon- which have to be swapped out from fight to fight either for each other or for more BLMs.
in 1.0, you pretty much could without exception. however,
you do have a point in that we don't know how 2.0 will play out. especially now since dps will have a short global cooldown rather than a mix of longer cooldowns (which i personally am not a fan of, as on the surface it seems to discourage skillful play) plus start with TP rather than needing to build it up. one of the biggest reasons BLM was always the aoe powerhouse in av/cc was because melee just didn't have the ability to keep TP in between pulls to have aoe ws ready all the time. BLM had aoe on demand. it will be interesting to see how that's impacted in 2.0
as far as the miser fight, you don't need to take my word for it. i posted proof.
if spells work the same, BLM would almost categorically suck against ramuh, absolutely. as far as titan, it's difficult to say- but i think it would be far more reasonable to assume he'd just have really high melee defense. but one thing you're failing to consider here is how the devs, as 1.0 went along, progressively learned to better balance job roles in groups.
while you can argue that, in practice, garuda and ifrit extreme didn't quite execute there- we can see the intention was clearly present.
with garuda, one sister resisted physical damage and the other resisted magical damage, so you needed forms of both. no stacking. garuda herself had pretty low magic defense, but her plumes were highly magic resistant. with ifrit extreme, BLM wrecks him... but you can't just stack BLM because you have to deal with nails, plus the fight is so movement-heavy that it can be hard to stand still long enough to get back MP. you also can't just stack only one melee class because you need to have jobs/classes present which can knock off both of his horns.
in practice, garuda could still be melee burned with monks and dragoons, or even *just* monks if you were good at managing fists. but most people primarily just used blms and had bards handle plumes. and ifrit extreme *almost* delegitimized BLM to the point of not being used at all. only the most skillful teams could execute a strategy which included a BLM. so they just barely missed the balancing mark there.
but darnus hard was a culmination of their efforts. darnus himself was strong-ish to magic but you had to deal with meteors and BLM wrecked them (bard sort of worked the same way, but you didn't need more than 1 of them). golems were strong to everything but wind, so you either needed a monk with fists of wind or a nuking whm to aerora them down. and dragoon destroyed darnus in single-target damage.
and while it's possible they could forget what they learned in 1.0, could just barely fail in execution again, or just regress a bit under the new engine until they can get back into the swing of things- the pattern we can see from av/cc through the end of 1.0 is that devs learned the community wants job variety for encounters. and since they know the community doesn't want to stack one job for every fight, and actively tried to design fights around that toward the end, i'm at least mostly confident they will continue along this path in 2.0
...especially since we're getting 24 man raids, and it will be extremely awful if they can't find a way to design the fights in a way which encourages us to bring *all jobs* to the fray.
in the end, while it's possible BLM could be lost in the fold- i doubt it, and it would only be temporary anyway. you can guarantee they'd rebalance to make sure BLM is still a coveted job.