I wish they would allow us to play the old plots without the fights like they do the Altador plot. Oh well.
Right now, I'm getting a lot of codestones from the koi warrior on hard, so I don't really see a a need to chance yet. I don't know of anything else that'd give me the np to sell for enough to make up for that.
Does defenders (assuming it's been fixed) scale to your pet's level, or does it just stop when you hit a wall for what your pet can take out? Edit: Looks like it has not been fixed. Boo.