ok kuetahulalapcaberawit as you want in youre PM, wanna some crit? this some crit from me:
nice, you apply as TSER and CLeaner
first you must set the height page in 1300px with 72 dpi
[spolier]
+C = to blurry and what wrong with the gray??

Beelzebub = to dark, and still many noise on those page
DMW = thats a good gray but you need burn the black area
Defense Devil = nice but same with DMW
Fairy Tail = nice but you need to redraw
Reborn = to blurry and still many noise, see mukuro hair
Rainbow = greaaaaaaaaaaaatt you burn and explode that page with TNT???

VK = the basic leveling is not enough
[/spoiler]
you miss the basic leveling in all youre page, if you confused how to leveling you can see some guide
you can see some guide from here, and all of youre page need more work
http://senbonzakura.kageyoshi.net/http://www.unblessed.net/guide/main.htmlhttp://www.questie.com/manga/ScanEditGuide/http://ieatsoul.com/training-ground/cleaning-101/and to get a prety Gray the most important is experience ^^
( i start to learning cleaning from there )