Nauhatli wants to be a turkey because everybody likes turkey, especially around Thanksgiving!
Nature bless does give regeneration to all sacred blessed troops, it's mighty fine.
Earth empowerment (you can empower any commander), if I were doing it, I'd empower a Priest-King or better yet, my Pretender. Pretender because many items and spells must combine with other magical paths before you can create them. Priest-King because Moon Priest can suffer from old age, and the paths of earth equate a bonus to natural protection per level.