The dual bosses, Cannoneer and Blade Bearer was by far the toughest boss fight or section of the game so far. I learned about summoning other players late into the game but held off using it until this fight. This is the only time Ive used the feature so far, but its completely legit so Im not against using it in these games. The other course would have been to grind for XP and power up or just learn the fight. Regardless of the summon the fight got tense and almost lost at the end. Judos was easy with the ability that gives you about 50 percent more damage but kills you when it runs out. You just have to take him down quickly with that activated.