Pendulum Dragon is fine as a 1-of, because it's searchable burst damage and it's a decent early search to just thin the deck
Then put all your previously selected monsters underneath your new Number Xyz monster
Do as many drafts as you can afford first, pick all the rares and mythic rares you come across, and then open your packs
To be honest, I have not had time to test out this tech card extensively, but I am listing it as another option due to its potential
This still allows you to have two Commanders rather than one, and thanks to the tight theming of this deck, they work together extremely well
In doing so they reissued barcodes for all booster boxes and booster packs which had been released prior to that point, from Base Set up to Neo 2 (Neo Discovery)