GREAT
sorry, dropped, the way mc uses his skill is just ugh, i mean, common, a flaming sword? and there is no distance requirement for the manipulation, mc should have just turned the water(not all of it of course, that would be a waste of mana) in the bodies of the fish he fights against in air(or something acidic or or or, but we dont know the cost of transforming and such, so i just choose something extremely common, anyway) his use of the skill is just so horribly unimaginative and inefficient.
I enjoy the action, but i feel brain cells die at certain scenarios. The whole dissector theme you tried failed as horribly as possible, opportunity to fire pressured water to slice em in half or actually using the anatomy knowledge to affect the insides, resulting in kills of beings he already fought and studied, but not the ones he barely knows. Instead you write about flaming swords he probably never saw in his life.