I want in!

Halfer makes a great thief and a good attacker. MS coverage might be a problem, but maybe your wars are smash and grab anyway since you can't fix the troop losses, so you could just skip the MS entirely.

The problem, as noted, is that getting the players requires a ton of work, and then getting a high-functioning team out of that is really hard, and everyone knows what you are and how you work so they prep for you.

*If* you have an existing kingdom core that will all go for the idea, now the main chemistry is right and you just have to recruit up to 22, that isn't too bad. Still gonna lose a lot, but meh, should be funny and fun.

I'd play faery, halfer, human, dwarf, UD - in that order of preference for a mono race kingdom. (Faery would be a wreck this age though, not like prior ages at all.) Avian is too meh other than speed which I can't do, I hate sci penalty, and elf just sucks.