So it's possible to get permanent residents from FD races? Because I have a White Tigerman in my army. This is so cool.
Yep. Gotta catch 'em all!
I've heard you should also be able to build them armor by changing the size of armor when you order it at the forge. I haven't tested that part yet though
Yup. You can totally armor them. You can armor them to the teeth like your dwarf. I've always felt bad sending my dwarfs to certain death, but I don't feel as bad with these mercs. They can train outside the fort and act as bait for all I care. Naga's venom is pretty cool when it works. I really like them. I so love the tavern feature of DF. I'm not at war with the war elephants, though they've ambushed me, but I've never had a war elephant visitor. They can clearly wear armor. I would love to get one for my army and see how much steel armor I can put on them. Lol.
edit:
Apparently Nagas are small and can only wear 1 boot on the account of having a tail and no feet.
White tigerman can wear the same thing as dwarfs in large. However they can only wear things made for white tigerman and not human, even though it's both large. I'm assuming a maul would be better for them than war hammer since they're large, though I haven't gotten a silver/steel one yet. The next war elephant attack should bring some. These guys also have a tail, though I don't know what you would cover that with.
p.s. I have modest mod, so no socks mittens or other things. I also didn't go for maxed coverage, they just putting gear on in the wrong order and complain about mixmatched equip.