Game the obstacle first - hit up the lesbian. I'm working on a HB8 lesbian SPAM, with the aim of converting her fully.
The way I approach it is just to pretend that they are straight. Just game her normally. Be open about her sexuality so she is not offended. I usually start a lesbian-in-a-relationship set with 'how's it going with her' dull opener because it implies I am cool with them being together, and she can talk to me about it.
So you're sarging the lesbian, you've got kino going, just get as far as you can. Then next time they're together, you can carry on sarging her and get the bisexual one jealous. Best thing is, HBbisexual can't get pissed because she is a lesbian hahaha so there is no worries there.
If you're going in with HBbisexual straight off, in a 1-set, then run bf-destroyer patterns but with the gf. Get HBbisexual talking about what she's done with her, and what she's done with guys. Then mix the two in conversation and calibrate her response.
One good direct opener I use with bisexuals is "Hey there, so I was wondering do you think a woman can give another woman more pleasure than a man can?" Then you can challenge her on it and bet her you can give her more pleasure by going C & F.
One last thing, if they're together, use double kino by getting group hugs etc..."You know, when I first met you guys I thought that you would just be your average girls...but you know what, I actually love you guys....GROUP HUG!!!" (Note that that's qualifying, so use different words earlier in the set).
Good luck
