About buffing conversion stone - it was never a problem in an off itself. Ok, it was, but the bigger problem is how much conversion value it added to a dungeon. I'm not saying it would necessarily be a problem, just that it generally SHOULD turn out to be.
Because if conversion means anything meaningfull, say adds base attack, even if it isn't stacking it's still a whole bunch of CP in there that wouldn't be there. Hmmm, how do I explain this?
There's aways a cap to the available CP in a dungeon and it's ussually (I guess always) finite. Add up all the glyphs and possible items, number of shops, blah blah, and the number is something. A 300 conversion stone brings that number up. Yes that means one or 2 more conversions, but they add up to the conversion points already present in the dungeon. What would the numbers on those be?
Again, not saying it's necessarily a problem, just wondering about it...
I almost got pwned by Shifty Brickwork!