Currency is quite good, but I usually want CS so I'll go CoL.
In certain situations, I'll go math-currency-col and sometimes I'll then lightbulb alpha with my first GS in the hopes of trading math for IW and skipped worker techs, etc. (also to get lit in time for GL). I'll often go this route with Hatty for example because I can skip a lot of techs with Hatty and get math-currency-col in a timely manner (I like to have col before 1AD so I can have CS by 200AD).
Currency is more appealing when running a CE because a market in a cottage city is just as nice as a courthouse.