assassinate at level 15 is +8, insightful is +3, falconry is +3, for +14 total, more than your +11 from trance. wiki uses old assassinate scaling, not new one, if thats what you're looking at. at cap, can get +16 enhancement +7 insightful +3 quality +3 falconry +6 shadowdancer very easily (can get more with past lives/dino bone artifact), which is +35. that is equal to 80 wisdom of trance. considering the fact that the DC went from /2 monk level to full monk level, aka another +10, would need over 100 wisdom with old DC to equal new DC (and this isnt including ancient tactics or dino bone or artifact). in addition, QP can now use dex OR wis, so QP basically got a buff at all levels unless you had ~110+ wis on a monk at cap (which for most players is impossible). yes, you will need new gear, but at cap assassinate is super easy to gear, slot the vecna assassinate aug and the gloves from raid and there is all the assassinate you need