At 3:50 you can also ad dugg back. On opponents turn you summon splatter, which summons merciless, which in turn summons charger from hand. You add a spell/trap from deck to hand for followup and full armor can them summon a 3-material xyz like Asura King for better Otk during your next turn
the problem with that combo is you would need to put a card in the extra monster zone so you have room in your main monster zones and if you're playing against someone who uses cyber dragons thats an instant contact fuse for megafleet for them otherwise you can do it as long as you put one of the monsters in the extra monster zone
There is an even more optimal combo that will let you end with either another xyz or an IP in addition to the field you left. You just overlay Fortress on Gabonga, detach it then res the Gabonga with Sploder. I think you can figure out the rest but basically you save the Merciless grave effect for when you recover a biker with Entrance's effect so you get the hand ss as well
