I also think a 2 boss run in DTK is good. I do Trollgore and the last boss Prophet Tharon'ja skipping Novos and King Dred.

Sure it's a lot of trash for 2 bosses and the fears from the trash up near the last boss are a pain but it's 2 Emblems, a Frozen Orb and an Epic.

I agree that the first two bosses in UP are a good grind. I have to try a few more instances and see how they go. I hate Eck and the Colossus in Grundrak.