- All shaman can interrupt every 12s, but you probably don't want to assign a healer on that job.
- Instead of bringing a MM specc it might be a possibility to bring a Gorilla/Moth, capable of interrupting once every 30s.
Nowadays all tanks can interrupt (paladin, warrior and dk all offer a second, backup interrupt on top of the regular 15s interrupt), this wasn't the case in T11 when we had a hard time on Omnotron of Nefarian because of that.
Anyway more ontopic: you can play MM, it's more or less viable (according to sims). But the rotation isn't smoothed out just yet and that's why compared to other speccs it feels somewhat lackluster. Keeping up the steady focus buff isn't fun and you'll cap on focus every so often. Hopefully this will feel better in 5.4 when AS get it's cost increased by 50%.