I have not really seen this mentioned here previously, and thought id share. We have 3 monks in our raid, a BRM, WW and MW(me).
We each place our transcendence outside of the gate for each fight, and on progression a wipe is sometimes needed because we fuck up and instead of wiping completely we just reset the boss.
This saves on repair bills, food buffs, but most importantly time.
Here are the fights that you can successfully reset using the taunt/transcendence method.
Gruul: Yes (just outside the gate)
Oregorger: Yes (but not during a rolling phase)
Blast Furnace: Especially helpful here since the run time is quite long and any add leaving the gate will reset the boss, jjust be sure to NOT taunt a caster, always taunt a melee add)
Hans & Frans: Yes
Flame Bender: Yes (but put the transcendence at the top of the ramp since I think there fire on the ramp)
Kromag: Yes but make sure that you are in the hallway since if he does his fist smash you will still get knocked up, but the ceiling will stop and limit your fall damage)
Beastlord: Yes
Operator Thogar: Yes (just outside the gate but not on top of the grate cause the grate still hurts)
Iron maidens: Yes but didn't use on this fight too much because if everyone is dead on the main platform and there are people on the ship, it will reset the boss so there is not much use but it is possible)
Blackhand: I have not specifically tried it, but I do not think it is possible unless you are resetting in P1 since the platform changes.
Many people may already know about this, but for those that don't, it is incredibly helpful. Our raid leads have come to rely on this, and it has allowed us to get far more pulls in during our raid time.