Pretty understandable I would say.
You do the numeron thingy and then summon slifer.
You can search slifer throug destroying creator with feather duster or storm.
Neos fusion, ruler or danger! to don't leave slifer alone on the board.
Can use pot of disparity instead of other draw cards if you are rich.
If not, then you also don't need 3x all of the numeron xyz and can put some others in there.
apollousa and borrelsword are also not needed and i'm sure Rainbow neos can be exchanged for neos knight or something.