Score graphs:  good or bad? 
The impression that I'm getting is that unless you can get a very early, very large lead in provinces its best to just be in the top third? otherwise you'll get ganged?  To small and you get gobbled up?
Research - do you generally find a huge research lead is grounds for a gang up?
Forts - probably not so much
Income - ?
gem income - ?
Seems like you almost have to play the graphs along with your diplomacy game.  For example, I took my last expandable province in a game just to have my main army doing something...  the previous province leader lost a province and it put me on top. Oh crap 

 So then diplomacy comes into play.  
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Random - are elephants/mammoths worth it for the late game? Do you have to jack the morale significantly or does it not make a difference?  Is there enough magic floating around that the investment and routing possibilities isn't worth it?