Now that new teams have conquered the Insane Level how about adding a new Hell Level to Solomon's Mine.
Something in difficulty between not requiring Revives but also not being able to autospin...easily accomplished by using some of the new abilities like seals.
Really Cool...make the final boss King Solomon himself. Add a very low gold chest drop to obtain his card. And give him abilities that could be used to improve Solomon's Mine runs like a 20% increase in Coins and/or Experience when using him. Players would run this level 1000's of times to get a card like that)))