I used Solar Wind Jammer instead of Cyber Dragon because it can be used with Machine Dup which is good. Phenomenal.
Machine Dup has 3 targets (Solar Wind Jammer, 2 lvl 3 Tuner Karakuri's).
In my Extra deck I use lvl 11, lvl 10 Synchro monsters in case my opponent uses a deck that can overpower me. (Not sure if good idea). I also try some Rank 7, 8 Monsters like classic Dracossack. I use Zombiestein to overpower Chaos Max Dragon. Can't think of anything that can kill Chaos Max.
Monsters in the side deck are what I'm deciding [Third Burei, Moonlight Dragon, Naturia Negate Trio, Goyo Guardian and Crystron (change all opponent's ss-ed monster to defense when it's ss-ed).
My Extra deck is a little bit weird, I know.
Looking for your supports!