This spec is what I use to box (5x ele shamans).

When i run 4 ele + resto I take out the stoneclaw totem glyph and replace it with chain lightning glyph. I only play bg's by the way, no arena.

Still unsure what works best for me, 2 points in elemental warding or 2 in resto tree for anc resolve.

Contrary to the above poster, I'm a big fan of lava surge & lava flows. But I guess to each his/her own; but I'm still not convinced of fulmination in pvp for my playstyle. It's very situational but I'm leaving it there for now to test it some more.