The fight against Cran is tough at first, but it’s actually very simple once you learn his attack animations and figure out when to dodge. Cran has a couple different attacks that launch him pretty far across the stage, and all of them can be dodged if you roll at the right moment. Never run away from Cran when he does his spinning flip move– you can see in this video that running away mostly doesn;t work. IN general, when Cran attacks, you want to run straight at him and roll through the attack.
Cran is weak to every single kind of elemental damage, but strong against slash attacks, which is the kind of damage dealt by swords, arrows, and other pointy metal things. If you don’t have access to powerful elemental spells, use a blunt weapon or a pistol and apply elemental damage to it for this fight.