Abed > Troy > Annie > Dean > Jeff > Pierce > Britta > Chang > Shirley
Funny note: If you put Todd in place of the Dean, ignore Chang, and switch Abed and Annie, I think this might have been the ranking in Competitive Ecology.
Early S1 Ranking:
Chang > Pierce > Jeff > Abed > Britta > Dean > Shirley > Annie > Troy
Most everyone got better, but Troy and Annie got so much better compared to pre-Halloween S1. And Chang has gotten so much worse. Pierce is pretty much the only one who's stayed exactly as good as he started out, in my opinion.
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"One toot on this whistle will take you to a far away land."
-Toad, SMB3