I liked the idea of this deck a lot, just switched a few cards. I use 1x Union Attack
1x Gravekeepers Vassal And 1x Secret way to treasure, just make sure to 🔥 his Signer Dragon before you attack with Pumped up Vassal, cause he can simply negate the damage, keep shooting traps with Acid Cloud till you destroyed his Icarus, and then blast him a new one
Yeah this deck is good idea it can pretty much farm everyone that don't switch your position or remove your monsters by effect.
Same with you, I used vassal instead. And in order to boost consistency, I skip using secret pass. Just summon nimbus in last turn and attack his att position with vassal. My vassal can go up to 20k damage at times.
This is, of course, if he doesn't spam the field with Blackwings, drop an Icarus Attack on your field spell, swap your Cloudians to defense mode with Elphen, blow them up with Silverwind, and just ruin your day in general.