I do run 4 enh + 1 dk in arena and with only weapons + one other arena gear i'm at a 40% win ratio. Not extremely good, but not so bad either.

I made isboxer click thingys above me grid to help with MW5 Healing.

I made 5 click buttons

[ DK ] [ Shaman1 ] [ Shaman2 ] [ Shaman3 ] [ Shaman4 ]

Clicking one of them set the step of en mapped key to heal the one just cklicked as part of the shamans normal Isboxer spam.
Clicking another one will deselect the current and change the step of the mapped key to heal the new target.
Clicking the one that is already selected will disable automated MW5 Healing.

I also have a key from the default spam that tries to Hex Arena1-4 from shamman 1 to 4 when possible (i.e hex is off cooldown, MW5 is up or i'm standing still)

// Ztar

By the way besides stacking up Honor for 4.2, i,ve also stacked up full justice point. And was thinking of converting to honor when 4.2 hits. Just to boost the amount of gear i can get at launch. Anybody else do that?