As everyone knows, Yosei has a very powerful ability when he hits your graveyard, so this deck is meant to abuse that fact, and shut the opponent out for a few turns, at least. The idea is to get Yosei out as quickly as possible, via accel cards. For Example: Extraplanar Lens, Land Tax, Sol Ring, Thran Dynamo + others. Now if Yosei manages to hit the field (Permission decks will hate on you), then the idea is to either equip him with Lightning Greaves and swing in for some General Damage, or you can blow up everyone's field with Planar Cleansing or Day of Judgment for example, thus killing Yosei, and triggering his ability. Enjoy yourself in tapping down 5 of your opponent's permanents, as they get to skip their next untap step, leaving you with a turn lead. After Yosei valiantly sacrifices himself for the greater good, you'll want to reward his service with some cards like Resurrection or utilize his right-hand-female Twilight Shepherd's ability. Then you rinse, and repeat, every now and then blowing up ONLY their field, to swing in with your creatures and Yosei.
I really like Salvaging Station in mono-colored decks. It plays nicely with things like Sanctum Gargoyle and Razor Hippogriff to make sure you've got a constant stream of artifacts to play. If you have salvaging station in play with a sac outlet and Nim Deathmantle, you just sort of get to go nuts.
I would also seriously consider adding Ranger of Eos and Martyr of Sands. I LOVE Martyr of sands + Deathmantle or Emeria; people just can't kill you sometimes. Ranger gets your Weathered Wayfarer, which is awesome if people leave it on the table.
If you go with some increased reliance on Weathered Wayfarer/Expedition Map, I'd add Strip Mine/Wasteland/Tectonic Edge. If you have an active Weathered Wayferer and Mistveil Plains, it's a build-your-own crucible of worlds.
Last, I'd consider adding some more stax-esque effects. Chain Yosei activations into an Armageddon or something, add Hokori, Dust Drinker to lock down their lands for an additional turn. You can even sac him to your Miren/High Market so you get to untap, then recur him with emeria for a one-sided lock.
Karmic Guide deserves a slot, and there's absolutely no reason not to run Archon of Justice, especially if there are troublesome artifacts / enchantments out.
Run Armageddon, you can tap down your opponent's board, earn a free turn to play things, they skip untap, then back to you where you just destroy all lands and have a full board of creatures left.
After all, I know how much you like land destruction.
Some of these, as you know, I'm already running. But I really like the idea of Carnage Altar, an extra sac outlet for Yosei, as well as the Dead-Iron Sledge. Because no one is going to want to block him with that on it :). I also really like Planar Collapse and the Armageddon idea. And the Archon would work as well... Any suggestions on what to take out?