Fair enough, but until you sort out what you mean with the above, then I can't get what you mean here either. What it sounds like is that you want to say:Also, I need to say that the -2 penalty only applys on Artytheurge, so a level 5 Artificer/Artytheurge I only get level 5 craft reserve. Not sure how to word that.
'You may add your Artytheurge level -2 (minimum of 0), to your Artificer levels...'
...on the other hand, this:
You may wish to say what happens if they wanna change back though...