Do a dry run and write down the order of sex positions, then change your draft and try to get the strongest girls that match those positions. For champions the girl's primary stat determine's how much damage they contribute, so the double damage for position match is the biggest deal.

For example, Murane at 5 stars and level 380 contribute's a little over 40k damage and Venifera at 3 stars and level 100 contribute's a little over 19k, but if the position for the slot is 69 that 19k gets added to your base damage of, let's say, 30k and doubled to 98k whereas Murane in the slot would be doing 70k.