Quote Originally Posted by Littleburst View Post
Because you can't allign the procs. When 1 slave procs and you use a lava burst, his lvb is on CD for another 8 seconds. Then the CD from the other 3 shams finishes, so you cast a lvb on those. Char 2 who had a proc can't cast LVB because it's on cooldown.
So in the end I don't think it adds anything.
Why not just macro your LvB ?

/castsequence Lightning Bolt,
/cast Lava Burst

This casts LvB whenever it's available.