I think the reasons why should be obvious, so lets choose our commander
(2018-01-19) If a Contraption would leave the battlefield and go to any zone other than exile, it instead goes to the scrapyard, the Contraption deck's version of the graveyard
When this creature enters the battlefield, create that many tokens that are copies of it.) Whenever Gary Clone attacks, each creature you control named Gary Clone gets +1/+0 until end of turn
As long as you control four or more Humans, Humans you control get +2/+2.
I want to take my good stuff cube, swap some cards for choices that can be slightly worse but still good (I feel like cutting cards is very hard nowadays, so there are a lot of options in the cube reserve), but have a more relevant creature type
Meanwhile, Abzan Keywords comes in last because it gets a $3 souped-up Fog when all of the rest of the decks have free spells in the $1020 range