Master of Fusion Can be used each time your Life Points decrase by 1800. In the Draw Phase, instead of doing a normal draw, one Polymerization Spell Card, from outside of your Deck, is added to your hand.
You can use six samurais now. I've been using them against multiple characters and it's very efficient. Just have a shien relatively consistently and you'll do well. Consider putting a few copies of power of guardians too.
Blue-Eyes is the way to go. My build is rather expensive, but it works like a charm.
I use blue eyes. Slow but consistent so far. Extra deck Azure is needed to revive spirit multiple times. Keep Azure always in DEF. And attack his facedown monsters if he has a face app monster and he will use his mines in case you miss them with Spirit. Deck can improve but that's the best I got.
Deck works, but not 100% consistent. Also, you have to play right. I lost 3 times, but 2 of them because I made misplays: I had Cosmo brain on field, silver's cry and Spirit on GY. OP used Reflector and GB, but I waited until attack declaration to use silver's cry and he beat my Cosmo brain and my Spirit.