Wasn't going to post this unless it made it passed the first week of hot fixes.
Felt like sharing a cool trick. My guild found, this may be working as intended or maybe just clever use of game mechanics.
But anyway, if stack in melee and chain smoke bomb before ice tomb markers go out nobody will get the debuff and nobody will get ice blocked.
This is hardly important for normal, but proved game changing for HM. Goodluck