+10 Red Hared Hasty Horse for a total of 60 cards in the main
10 card 'side' deck, because a pack of yugioh sleeves comes with 70 cards and this fills it out.
MonoBlueTron 's original version: https://ygoprodeck.com/cube/view-cube/35397 and video is linked.
Still thinking about Goblin Out of the Frying Pan and Malfunction. It still takes 4 activations to = 1 Horse attack, so activating 3 still requires the same number of attacks as a deck without them. But too many Counter Traps might be unfun and stifles the chain too much. Still testing. Maybe Dark Bribe should the only hard stop.
I seem to have lost my copies of Phoenix Wing Wind Blast sometime over the past 10 years... They'll get added when i find them. 7 copies of this card REALLY changes the entire game though.
Considering:
Crackdown to pair with Generation Shift
Sword of Deep-Seated for top of deck shenanigans. but it does muddle the combat math more with the Counter Trap mentioned above
Broken Line to increase the counter trap count, to keep the chain going a bit longer sometimes. But again: too many counter traps seems unfun.
Kingyo Sukui is more top control.