Aside from the customary universal tank macros (provoking so-and-so enemy for tank swap, "I just used walking dead"), I've been able to get away with just macroing Shadowskin/Bloodbath, since they're on the same cooldown timer. I am also in favor of Foresight; it's the same damage mitigation of Shadowskin. It sits on a longer timer but can be rotated in along with the other defensive cooldowns just fine.