Rankings are based on the following priorities:

1) Demon Soul
2) Corruption dot is maintained
3) Unstable Affliction dot is maintained
4) Bane of Doom is maintained
5) Haunt
6) Summon Doomguard
7) Drain Soul only if Boss < 25% health
8) Shadowflame
9) Soulburn and then instant Soul Fire
10) Shadow Bolt

Fel Armor is the self buff used
Felhunter is your summoned pet

Stat Importance

Intellect > Hit > Haste > Crit > Mastery

Reforging

1) Reforge your weakest stats until you've reached 17% chance to hit
2) Reforge Mastery and Critical Strike to maximize Haste