Time Stop, it goes hand in hand with Improved Alacrity. You can deal much more damage with the Time Stop + Improved Alacrity combination than Chain Contingency. If you have the Robe of Vecna + Amulet of Power, definitely Time Stop. Enemies have been causing you pain with Time Stop, time for you to be the executor now.
Besides... with Time Stop in your hands, it will only be a matter of time before you gain Chain Contingency as well.
