So first of all you MUST use prime evil quest because you will want help of tyrael. Simply go to crystal colonade and pick up tyrael he will follow you anywhere now.
Now teleport to Silver spire 1 tier.
There is pretty solid chance that there will be champs / elites Right after you walk down the stairs. Now the doable part is in that it possible that the elite / champs will be the bile crawer which is pretty weak.
Tyrael is the trick here cos he WILL keep mobs lock in combat so they wont reset their hp to full and he hits pretty hard too.