Question about Drain Life Afffliction specc

[Hamanard]

When 4.1 hits this afternoon I'll attempt the drain life rotation however I've got a quick question. What is the best way to stack 3 SE on my soul swaped target? I'm assuming refreshing haunt on the primary target to build up the stack and fire the night fall SB procc on the secondary target?

2/2 mana feed is guaranteed which eliminates any points in bane so I'm assuming hardcasting SB is a dps loss?

[Palmz]

It would probably be best to use DL for single target fights w/ UA glyph and SB spec w/ agony glyph for multiple target fights for spell cleave.

[Calabera]

I was wondering the same and the only solution I can come up with is NF procs on the swapped target while hard cast SB + haunt on the main target (initial rotation hardcast SB to get stacks going) Haunt should be enough to maintain the stacks from dropping on your main target.