For trash, I treat it the same as bosses. Curse of Elements, Immolate, Chaos Bolt, Conflag, Incinerate until it’s dead. If it’s an AoE group I just use Rain of Fire.

For instance, you could create a warning that pops on your screen if your current target, while in-combat, does not have the Immolate debuff. This is a bit extreme in my opinion but whatever helps you play better, you know? I think using a simple DoT timer like ForteXorcist would be all you need.

You can download both at wow.curse.com of course =)

The rotation is to DC, Meta, Charge, IA, Shadowflame, teleport, nuke/drain life/drain soul.

Of course, bringing out the right pet for the right situation helps a lot. For group fights like WG, use voidy for Sacrifice. For single fights with melee, use succy; with caster dps, use felguard; with healers (especially pallys), use felhunter. Oh, and always have voidy out first, bubble, then summon appropriate pet. With Master Summoner and Fel Domination, this is seemingly effortless.