>>79232870For generic faceless male I'd say don't bother even using region prompting, just specify spitroast, vaginal or anal and oral/deepthroat/irrumatio, maybe give those extra weight as needed, then so long as your composition is good (i.e. the image being wide or long enough to do what you're asking for) you should be good to go. Here's some examples of what I can achieve very consistently just plugging in different loras, feel free to take the prompts and tweak them to your taste
https://catbox.moe/c/j7ynq8The Okayu ones are a little scuffed because I was specifically trying to achieve the held-up-by-penis-dangling-arms-and-legs thing (going to try it without the lora too at some point) but if you switch the ratio to wide and change it to all fours instead it should hit every single time. And obviously switch the boy tags for futa tags if that's your thing.
For specific characters it's a bit more dubious since I've not tried it myself, so pinch of salt and all that. Theoretically the base prompt should be what you need here, on paper at least that's where all the spitroast, futa on female, doggy etc. tags should go (common prompt adds to every region, base prompt is meant to be the whole image composition without affecting region specific things) then stick with just character and expression prompts in the regions, but how it might actually work out I don't know. For the zoom issue at least you could try weighing up full body, not sure if it would be better in common or base though. You could also go for not having the faces shown but instead use clothing from the loras to make it apparent who's doing the fucking. And may be obvious but play with your base ratio, the lower it is the less mixing there'll be. You've successfully gotten me intrigued, so once I'm finished what I'm currently doing (which will be a while) I'll take a crack at it myself and let you know what I can come up with. Keep us posted on your progress too.