>>3823775
I'm the kind of person that verifies every nook and cranny, but I tend to wing it in the post-game and turn down the difficulty because I can't be assed witht he grinding then:
Blight: 28 hours
Awake: 29 hours
Colony: 33 hours (I actually bothered with grinding and fighting most of the postgame bosses this time though eventually got my ass kicked by the final one and lowered the difficulty then)
Asylum: 33 hours (I fulfilled both routes so this accounts restarting from the scratch. I again lowered the difficulty on the post-game superbosses)
Kludge: 30:30 hours. This includes most of the post-game bosses too by the way though I didn't fight the simulation of the fused ultimate weapon nor the final post-game boss.

Bonus:
Atline: 16 hours. I gave up on the goddamn dragonfly post-game boss though since you'd have to fight 4 postgame bosses without saving in-between before having a shot against the Mother of all Mana. This does however include beating all the floors of the extra dungeon
Ghost Path: currently 9:43 hours. I started procrastinating after getting the flying ship.