I know that you're talking about non-feed pets but here's a little look at a really fed Niss if you wanna reconsider her for quests. I'm saying that niss is good but you just need to scroll her to right stats. Kojika's Niss, from her story, was just lost from the moment she didn't scroll her at 20. I did, and thank god I did....She's pretty beast from my use and even back when she was still training she had excellent stats. You can see it here from my old topic on my niss and elin which ironically is the pet you're going to switch out with her. I don't know if it will convince you but here - http://wlodb.com/topics/12766?page=1