Primary(~3000 turns):
Commie indy
Rep casher
Demo/Fascism Farmer

Tech start works well in primary; you got allies to give you that extra 30% if you can find them and doing a straight farmer/casher is hardest on this server. So Tech start his low risk and very competetive.
----
Express(~2000 turns):
Commie indy
Theo/demo/tyr techer

Tech start is not needed on express in general but for a casher you might want to do it anyway rather than buying overpriced tech and feeding the techers free wins. Cashers and farmers have a hard time to compete on this server in general.
-----
Alliance(~4500 turns):
Fascism Farmer
Rep casher
Tyr techer->demo techer

You pretty much never wanna tech start in alliance unless you are planning to war or are up to some kind of cheese strategy. You don't need the early income if you are gonna netgain since you will spend so long building CS that your techs have time to get raised little by little by just buying them every day and growing slowly.
-----
Tournament(~2000 turns):
Commie indy
Rep casher

Tech start is decent here because it is a solo server without bots so you might not wanna look like a good target as you would doing a straight casher start, and tech prices are sometimes high anyway. Tech start is the safer option anyway, definatly not the best but the safest and lazyest approach.
-----
Team(~3000 turns):
Commie indy
Rep/demo casher
Fascist farmer/oiler
Rep/demo Farmer
Theo techer

Tech start is decent here because tech prices run incredibly high early on many sets, and the market is sometimes completely dry so you can't even buy overpriced techs. Tech start offers consistency in this regard which is valuable. Also for war you might wanna tech start here.