Unleash elements + lava burst macro?

[zenga]

Why are we assuming PvE here? Unless I missed something that the OP said, they didn't specify. I would assume a PvP scenerio, anyways, based upon the last macro they posted (FS/UE/LaBu/CL - > Sounds like trying to burst somebody down, not a PvE DPS rotation).

I would much rather use the global on UE in PvP and have a chance to gib somebody than wait for another cast to go off and have them get healed. I'll take the LiBo and Fulmination argument when 4.2 rolls around.

It doesn't really matter if it's for pve or pvp, since UE consumes a global cd. As said it's only viable for when you need to move.
The only real scenario where it would be a gain is if you were to pop FS, UE and then Elemental Mastery with Lava Burst. And in that case it's very likely you'll need a mastery proc to go off to get an instant kill.

Obviously an argument that you can't get locked out of nature school when not having to cast LB is not factored in.