At some point it's a pay to win game. Bosses ability and strength is broken even with epic and legendary heros, spin wheel doesn't work as u don't get magic crystal and something the items you land on. Gear materials are easy to get the scrolls however is not. Upgrading heros takes long and you cant view the heros before hand, Respawning of monsters in areas would help alot. Dragon spawn time should be shortened for lower force players to get higher damage rank for better rewards.