I have upgraded a number of my tradeable magic pets with the numerous stones I have gotten from bags.
Darting Hatchling and Ghostly Skull are about the only thing you have I would be interested in,
but I have used most of my stones on tradeables opting to farm for rares on all wild pets.
There is also a high chance any pet you are trying to make rare I have already made rare, from any family.
Just let me know...