the main difference b/w bi women and lesbians, besides who we are attracted to, is that bi women use dual wield weapons and lesbians use one larger weapon. the dps is about equal but lesbians excel at single target and bi women are good at aoe, so i would suggest having at least one of each in your party for endgame discourse
A good party consists of one bi, one lesbian and either a demi who can resurrect one person per battle or an asexual who doesn’t fight but can act as the healer.