i’d recommend you plus 2 members of the opposite sex. so, fmf if you’re a boy, mfm if you’re a girl. or you and 2 of the same sex if you’re into that (fff or mmm). assuming you go mixed, you want to be the one that’s different (at least for the first time). put yourself in the position where you’ll be the center of attention, not competing with anyone.
thinking a bit more about it, if you’re a guy who can’t go multiple times, maybe going mfm is wise. at the very least, if you go fmf, make sure the girls are into each other so after you cum, they can play with each other while you get ready to go again.