Peace out MP10 Scorps!
I hear some guy wrote a really great guide about getting high xp/hr in Act3 MP0? I might check that out! ;)
How much of the experience of Arreat Crater is coming from those crawlers, though? Every so often I still do the old three-area run of Act 3 MP-0. Usually when I notice that I'm at about 10m XP or so from the next level and want to top off before logging out for the night. I think most of the XP comes from the Keeps, but I wonder if the overall run will suffer much.