Wow, that zekrom looks familiar (I'm using one very similar, lol). (After playtesting, I found that
Haruno's recommendation of tailwind was useful.)
My ace supporter has definitely been hitmontop. It looks like it can be a drop-in for your mienshao. It has ability intimidate to increase physical bulk (and give ekiller a -1 attack drop), fake out, wide guard, quick guard, and close combat. It also has much better defenses than mienshao (though, you have to be careful with close combat). I've given mine a lum berry to counter darkrai (as fake out + close combat guarantees a KO with lum berry), but if unnerve + darkrai is actually going to be a thing I see in competition....I dunno.
I've also been using rocky helmet amoonguss, which uses rage powder to redirect attacks (all but fake out), and it kind of works.