I think you really hit on the key question here. Synthetic (inferior 
cops seem to be less reliable than TAL and/or TAH with bi girls. Don’t overdo the femme mones else there is a risk you create a social hookup and allow some lucky girl to have your mix attributed to her.
Also worth exploring better the difference between behaviour and biology. The structure of female sexuality is different - there was a cool post on this way back, but I can’t find it right now… JV Kohl? - and a large minority/small majority (?) of ‘heterosexual’ girls seem to have the potential to be turned on by other girls. (Just as a decent proportion of ‘lesbian’ girls seem to be able to be turned on by men). So the bi/lesbian direction for women works differently than the bi/gay direction for men.
Maybe it’s better not to take what people, especially young women, say about their mating preferences too seriously initially… and just treat them like you would anyone else who hadn’t expressed such a preference. If you google ‘gaming bisexual girls’ and ‘gaming lesbians’ you will probably get some inspiration.
Hope this hasn’t upset too many people - based on my experiences to an extent, and what I have read.