I don't know if this is exactly the best build (Mine, not yours) but this is what I use and I rarely lose with it

Monsters
-Clockwork Shikigami(Since this deck consists only of machine types) x1
-Ninishi x3
-Inashichi x2
-Haipa x1
-Sazank x1
-Kuick x3
-Nisamu x2
-Nishipachi x2
-Saizan x2
Spells
Dark Hole x1
Heavy Storm x1
Karakuri Anatomy x2
Karakuri Cash Cache x3
Karakuri showdown Castle x1(Just incase it gets destroyed)
Limiter Removal x1
Machine Duplication x1 (For Ninishi.)
Monster Reborn x1
MST x2
Duality x1
Traps
Call of the Haunted x1
Karakuri Trick house x1
Mirror Froce x1
Solemn Judgment x2
Dark Bribe x2
Torrential Tribute x1
Extra
Ally of Justice Castastor
Black Rose Dragon
Brionac
Burei x3
Bureido x3
Stardust
Trishula
Like I said, I don't know if it's the best build but it's what I use and It works fine o.o