I posted over in your other thread too.

I would think if you were to go from target A to target B etc, and DPS them down without subtlety, Click type macro's would rock.

However in PvP, you will generally get more from moving from target to target. You'd want to Glyph for Flame Shock having a reduced GCD. The talents to reduce its cooldown would be great. I'm not sold on reducing the cooldown on Elemental Mastery, although that is our I-Win button.

With a click macro, you'd Flame Shock then Lava then Chain then Lightning spam.

In Arena or BG's, you'd likely Purge a bit, Flame Shock someone, then Flame Shock someone else. You'd really benefit most from having an FTL system where any toon can lead as well as any other. And then having Flame Shocks on more then one person at once, so they're not sure who your real target is. For arena, I'd want the Elemental Master (I-Win) button, and then have each major spell on its own hotkey - Lightning Bolt, Chain Lightning, Flame Shock, Frost Shock, Lava Burst, Purge.