I beat the game without ever rerolling. I built warriors -> knights -> 1x paragon, some thief-> 2x rogues, archer-> sniper-> 1x artillery, and got a samurai from the shop (no idea how to make one). I gave the artillery some awesome rare items which healed my whole team and stunned on attack, and gave the samurai a mugen cap hoping its double attack would trigger the mugen cap effect every time...not sure if it actually did. One of my rogues had two lifesteal claws which was also fun to watch. I really enjoyed the item-unit synergies that were possible, and I really like how each unit can have 2 items. Great game.