Knight at Arms
mmmm. ok, not worth it imho. 300 is more than enough in most cases, especially with steward.
also 330 smithing? man, that's a lot of stuff that has been reprocessed.
Actually steward is the higher the better cause it reduces troops cost with each lvl above 200 after you get a perk. It's really easy to raise cause You just need to run around with different foods in inventory.