Top Secret Packs used

Summon Isolde early to summon a copy of Shinai while adding either Kageki or Captain to the hand (if neither remain then Fire Flint Lady), then summon Battle Shogun, ideally keeping Shinai on the field. From there your goal is to get Baseball Kid on the field for the OTK. You can search for Baseball Kid using RotA, or using Durendal. Durendal can be retrieved from the grave after it is sent there by Isolde with Renaud. After that it's a matter of summoning it with either Saryuja or Fire Flint Lady. Thin your deck where you can with Gateway so that when you draw with Dugares, Saryuja or Golden Bamboo you are more likely to draw into something to get Baseball Kid.
You can summon Shi En or Baronne or Apollousa at some point mid combo if you're worried about being stopped. However, this deck is largely about playing first, and persisting through handtraps since it doesn't run any itself. If you're stopped early you may just fall flat on your face. That's why ideally you get at least three monsters on the field before summoning Isolde, because then if Isolde gets negated you can at the very least link her out to summon Battle Shogun.
Once you get Baseball Kid on the field it's a matter of cycling through Mizuho 16 times to burn them, but most people scoop before that. If you are unable to complete the OTK your best plan B is to try to summon Apollousa, Baronne and Shi En.