You need this:
1) 5 Nightslayer pieces- +10 energy
2) Vigor- you get this from talents, gives +10 energy
3) Daggers

Macro:

/cast Ambush rank (highest rank)
/script SpellStopCasting();
/cast Backstab (highest rank)

Put this into your stealth bar. with vigor and 5 noightslayer u have 120 energy, which lets you use both at the same time. With nice weapons, and lucky crits, this can do almost 4k damage at 1 time... if u dont think thats a lot, think again.

CAN U make one for warlocks?!?!?