It depends on the dungeon and the group. Sure, when you go in an older Dungeon with overgeared people you can burn your CDs all you like (but you don't need to anyway). But with undergeared people or in Expert where most ppl are still near minimum item levels, you will need your CDs as DPS won't burn the mobs down that fast. Especially in that first big pull on Akadaemia.
Now, getting a bad or undergeared Healer is an whole other thing. But then you would probably stop doing big pulls anyway.
Yes. And helping your healer is best by reducing the incoming dmg constantly over the whole pull then beeing nearly invincible at the beginning and running out of CDs. Of course, if you know you don't need your CDs later or if you need to cover some time (for example the healer just died and is getting resurrected by the SMN) you can pop them indeed together, but I wouldn't give that advice as a general rule. Adjusting to the circumstances is one thing, but wasting CDs is another.You technically don't need to pop any cds, but we're trying to help out the healers as much as possible here.
That's why I start with Nebula. Until I reach Rampart there is also arm's length and the first mobs should be dead at this point so DMG will be lower. Always start with your strongest CD.That's going to be heavily dependant on how good your group is, because Rampart alone in a mass pull is nowhere near enough, unless you're being babysitted.
It's simple math as the time it takes to actually burn my hp down by the mobs counts too. If I just pop my Superbolide we will get 8 seconds. If I wait 4 seconds longer before I pop it the party actually gain 12 seconds. The longer I wait, the longer I survive, more mobs may die as the healer can longer DPS and if the healing cast is coming in this 4 seconds, I may not even need SB at all.You get the 8s of invuln regardless. I'd rather burn 30k hp and have the pull succeed than min-max my Superbolide usage (which it shouldn't really come down to in the first place anyway)
Well, HoL only reduces magic damage so unless the mobs are attacking you with magic spells it doesn't do anything for you in big pulls. It's better to use this [and Reprisal] for the bosses.