Good group: anything with a bard. They give us the most return with overhaste + arcane aria + spell focus aura.
Best group: Shaman, Bard, Berserker
The first thing I'd like to do is cover Intensity of the Resolute. As it stands, the damage modification portions do not stack with either of our disciplines, so it's basically a disc in itself. Unfortunately, most burn scenarios do not last long enough to justify it with itself. For cases like these, I stack Intensity and EF for the +crit portions, to maximize that disc, but I am losing the damage mod portions.
Having an enchanter cast manaflare on you is (usually) very easy, as they should be paired with caster DPS to receive the MF aura. They should always have a room in a rotation, thus you should always be able to get it.
Casting spells should never, ever stop. Your five main spells are obviously our top three nukes, Frozen Venom, and Yowl, but with Manaflare, you should have atleast one DoT memmed. None of these spells should ever be up - you should always be locking them out, casting insta-DoT's in the mean time to proc manaflare for easy damage.
For optimal burn sequences, you should wait for the following before discing:
1) Harrow and FS are both ready to fire
2) Circle of Power, Shaman Epic, Bard Epic, Frenzy of Spirit, and First Spire are on you
3) Your tank is actually surviving so that you don't get roflstomped when no other tank is ready to pick up your mob.
Once those three are ready, you hit empathic fury. Immediately after you hit it and retarget your mob (which should take less than half a second), Harrow and FS go off. Assuming you time it well enough, you can get three FS's off during Empathic before it fades, as opposed to the old two. As always, you should NOT stop casting during this - you gain more damage from the spells you cast, as opposed to the damage you would have gained by not casting and swinging weapons.
After that, your better judgment has to come into play. Do you wait for epics to refresh before you hit BA, or do you hit it right after EF fades? If the fight will last long enough, you should wait, for optimal DPS. If the fight will end before 3 minutes has expired, hit BA and ride out the rest of the epics to milk the damage from them. Don't wait for FS/Harrow to repop before you hit it, because the gains you'll get from non-special attacks will be better than if you had waited since they're stacked with shaman/bard epic.
Another important thing is how you start the fight - DO NOT USE ABILITIES that will NOT refresh before the fight is over - use the ones that WILL. The sooner you use a 30 second ability, or spell, the sooner it refreshes, thus the more damage you can get from it. ALWAYS lead a fight with Yowl and Nukes, and save stuff like Attack of the Warders and BP clicks for when those spells are cooling down.
I'm probably forgetting something and I'm exhausted - ask if anything is unclear.