Fuck niche... make a good creative content... if a niche is a part of it so be it. Ryu's table is as good as any ( have a look above) ..." so Downblouse lesbians in panties and later without the blouse and panties" is probably a good bet.
Also NOTE that models do not want to get it up the ass from some blokes and will refuse and be more expensive ....thus with lesbians have a better shot.
The key is quality of the models ( not seen many around here), good sets and quality WB, make up and hair.... and well lit with a good sound is a must. If you cannot afford that, then go spying somewhere on chicks with your cellphone, make money but get arrested and spend your money on lawyers and bail bondsmen.