A combine of Kaiju monster and Relinquished.
Today, I think a strong deck is a deck which can cut your enemy combo, not can summon high ATK monster, and the best stragedy I think is send enemy monster to GY without active they effect
With 5 Kaiju monster and 2 Lava Golem, you can easy send they monster to GY and no one can stop you to do this.
And you can use Relinquished to steal that Kaiju.
Main boss is Milenium Eye and Relinquished, when they steal enemy monster, almost enemy monster you steal has effect negative when they in field or send to GY(because they in spell zone and they send to GY, not destroy) , and Milenium (and Illustionist hand-trap) is QUICK EFFECT, that mean hard to stop him. If you play well and with some lucky, you can easy to cut combo of enemy and kill so many strong monster.
Some combo I can see:
MAIN COMBO:
alway FIRST use kaiju to replace enemy monster because many deck need some type of monster to active a trap or hand-trap
Relinquished+Faceless mage(in GY)+Illustionist make your Boss near immortal.
Illustionest-Millenium can negative 2 effect monster. Notice use Illutionest first because enemy can negative you with solem or Rabbit.
Dark Renewall =>replace relinquished with Faceless mage , because it is hard to send faceless mage to GY to make combo( because also hard for draw him or summon him with LV5, normal way is tribute him with ritual spell) and destroy a enemy monster. Or you can summon a relinquished from you GY and destroy faceless mage with that trap.If you lucky, you can have 2 relinquished. Many combo with that spell.
SUB-COMBO:( I put on side deck)
So I add 2 Instant fusion, you can summon a thousand eye retrick, steal one enemy monster, then at end turn thousandeye will die will die and send that monster he steal to GY. but I dont think this is such a main combo because very easy to counter it.
Moon mirror to kill some monster that cannot target by effect.
Breakthrought skill or Lost wind to negative enemy effect but NOT destroy it, because relinquished and Kaiju need monster to active effect. I like BS than lostwind.
So Phantom of chao is such a mention choice.
So this is not a link-XYZ or Syntro deck, uhm, you can not summon many monster in one turn to play that ways, and that not neccessary. So I put linkuriboh, and LANpholinkus is you play Tag with friend.
And the last thing I want to say: THIS IS NOT A META DECK BUT NOT A FUNNY DECK, so many combo you can use with it and can make enemy very hard to control the battle, but you dont think to use it in tourament. And you can change any card you like if you thing that card make deck stronger or just because you want to use them. Good luck and have fun.