I'm continuing Uber progression, what I'm wondering now is there a list anywhere that says what all the trophies give as an added bonus? Knowing that would help me decide which ones are worth farming. So far I've only got Lord Aldric Jitan's trophy.
Also, I need to vent about the Judgement day bonus. I did it 11 times - and 11 times I got the same guy spawning twice.
. Then the 12th time, I got different ones to spawn, but messed it up by getting gibbed by an MIRV a split second before I portaled out. Thankfully the 13th time was the charm - if I was a luckier man somewhere in there I would have found the trophy, but obviously I am not lucky.
My Judgement day bonus strategy was a bit different that what you suggested. I first cleared the cathedral, then went back to the inner cloister and summoned, then dragged the bad guys over into the cathedral, far away from the waypoint (I liked to bring him all the way back into the corner small room in the far north, but that's unneccessarily far). Then I waited for Imperius/Mathael to spawn, and the second they did I town portal'd out. Then I went back in to the waypoint, and summoned the bad guys a second time. This time when Imperius/Mathael spawn, I kill them, then take the waypoint back to town, then run to my town portal, which leads me back to where the first one was waiting - should be able to kill him with 10 seconds to spare, easy. I was just using my standard ice/lightning melee spec.