Newb seeking advice on troops, what next? (long)

[Sir Whiskers]

I'd suggest replacing the priests and peasants, and possibly the bowmen. Good options are Royal Snakes, Griffins, and Inquisitors. The first two are very cost-effective in terms of leadership required, and you should find inquisitors more useful than priests.

You didn't mention the rage chest. If you haven't activated the first two spirits yet, you should do so asap. Once you get Sleem's Evil Shoal ability, you'll be able to trash the ring keepers with minimal effort.

Enjoy!