i was going through some topics cuz i was bored and i really like this one. it was about upgrading
so essentially, it would allow you to upgrade a weapon to a higher rank using another weapon of the rank you are trying to upgrade to.
for example, if you wanted to upgrade a legendary brutality to mythical, you could use a myth nightmare to upgrade that brutality. this could help reduce the amounts of unneeded mythical items and/or epic/legendary.
another thing i wanted to add
i reckon that the upgrade gold cost is, quite simply, way too high. lets say you wanted to upgrade an epic item to legendary. you have to sacrifice 4 items of epic rarity, plus an additional 50k coins, not even including the ones needed to upgrade that item to max level in the first place. this causes players to waste or use extremely large amounts of time farming bigboy.
this may not be a problem for the rich players who can simply buy tokens and exchange them for gold, but for the people who cant buy tokens because their parents wont allow, or they simply dont have any pocket money, it is a very big problem.