As always, this requirement introduces some risk, however, the low cost of Pip-Boy 3000 means you dont have to risk the world
Long-game card-drawing advantage aside, Kefnet comes down early and, if set up properly, can deter people from attacking you for a good chunk of the game
Slotting in Welcoming Vampire to replace Sporemound is a good choice, reducing the overall casting cost curve of your deck a little and replacing a card that relies on landfall triggers to be good, something the deck isnt optimized for
Parting Gust
5C mana-fixing rocks like Chromatic Lantern, Fellwar Stone, and Coalition Relic are perfect here, but even the signet cycle (Golgari Signet) and the talisman cycle (Talisman of Creativity) do a great job here
Cruelclaws Heist I must admit my bias here: Bloomburrow s Cruelclaw's Heist is one of my favorite Standard cards