Dot up the enha - let the rogue dance open with garrote, fear the healer at the same so he can't tremor. Follow up with cheap or kidney, shaman should be low already because he couldn't use shamanistic anyway.
gg, collect points
You can tremor while feared. Pretty sure you can SR while stunned. Nature's Guardian goes off no matter what.
Yeah you can shamanistic while stunned. And who's talking about fearing the shaman?
If you kill the shaman in 4 seconds of garrote, that's on your teammates for not peeling. I doubt you can do ~500k damage in 4 seconds, though. As soon as garrote is off, he can use SR. There's also trinkets for situations like this. Enhance shammies actually have better defensives than a couple melee, such as Arms warriors.
Subterfuge and cloak means a rogue can be unpeelable for 8 seconds and with only a 1 minute CD on cloak, it's not too punishing to use offensively.
Then survive. After garrote is off you are free to use defensives. Your allies can peel with physical stuns and such still. Your allies can apply pressure to their team. And if he uses it offensively, then you get on him after his opener. I'm not saying rogues aren't strong right now, but they are already getting nerfed by quite a bit next patch. Cloak of Shadows is one of their defensive skills, especially against an enhance in Ascendance. Subterfuge keeps them stealthed, it does not necessarily make them unpeelable. Difference being ground-based peels still work, such as explosive trap or frost mage pet nova.
This isn't even mentioning the fact that Enhance may have the one of the strongest burst sequences next patch, along with damn good utility.
Can't ground when silenced or stunned, can't tremor when silenced or stunned, can't use our joke of heals when silenced or stunned, you can drop healing tide but who cares about enha healing tide. Can't use shamanistic when silenced and a lot of people just nuke through shamanistic because it's only 30 % and you can just keep pressure high on the shammy through it. I've met multiR1 thugcleaves that wouldn't kidney when trapping and then go "omfg he grounded my trap" on stream... well shit, do the basics vs shamans and they flop over.
10 % glyph of lightning shield will be huge next patch, but the only defensives that really matter atm are hard resets or passive dmg mitigation.. none of which an enhance has.