best way to slow down progression is to just remove all runes from gold shop and remove the upgrade rune scroll. down grading is fine as it means you need a hr to be able to get what you need. upgrade makes runewords ptw for early game.anything in the cash shop should be purely cosmetic.you could also cap all drop rates at the 8 player game rate so you can have 64 in game but drop rates wont be effected. imo this will draw out the game experiance enough for the time between resets.