Just think 2 second about the implication of what you are asking. A casual player will need a Soldier to complete a path with undogable boss, a sinister gear to complete a dungeon with a boss immune to direct damage and a zerker gear for the rest. The worst part is that most ’’elitist’’ won’t have problem to get 3 different armor, but casual players?
That goes to show another way that the variety of stats on gear is mostly a wasted element of the game. You shouldn’t have to grind money in order to have the fun of changing strategies, including the stats on gear. I’d either get rid of different stats on gear, or I’d make it free to change stats. At least make it so that grinding the money to unlock stats once makes it free to change them thereafter.