[Elixir of Ironskin] opens up so many options. I also use
[Staff of the Forest Lord] for the extra threat and avoidance on Brutallus (don't have Stanchion yet). With an
[Ironshield Potion] I'm still over the armor cap normally. I'm still right around 22k health with stam gemmed gear. Perhaps when we get him on farm and don't need to use as many consumables I'll change gear up. Again, the main reason I prefer pocket watch over SMI (or CoT) is the active use. Since both trinkets have a 2 minute cooldown, alternating between it and BoT means one of them will always be up during stomp. So, my normal avoidance is lower but it jumps up whenever the real damage is incoming. I'm logged in my Brutallus gear atm. I use slightly different gear on say Kalecgos and the warriors do end up taking less total damage than I do, especially since I normally don't have a shaman or use heavy consumables there.
When learning an encounter (before serious attempts) I'll use a flask. For normal attempts I use ironskin elixirs when tanking on all bosses now though.