Right now I'm at 75 base dex and using str gear.

I guess my main question is what dex should I be at?

your dex should slowly go up as you get higher levels ( unless your loaded with fg )

what i would say to newer player that is that your dex should somewhat be about 20~30 points below your str

and it will work out from there

with your current character - http://forums.d2jsp.org/user.php?c=3&i=422040&p=361534

with the 75 base dex is not to bad considering the gear your using plus a fairly ok weapon

people tend to find dex to become less worthwhile when it starts hitting the 3 digit range ( 120 to be more precise ;/ )