Interesting build. I’m tempted to build something similar. A few suggestions that jump to mind -
Creeping Renaissance - return all walkers from your graveyard to hand for 5 mana and again for 7
Plaguemaw Beast - another repeatable proliferate. Should be easy enough to fuel with your token generation
Rings of Brighthearth - copy loyalty abilities for 2 mana. Great with Chain Veil too
Cloudstone Curio - reset your low loyalty walkers by bouncing them when another comes into play. With cost reduction and mana doublers you might even be able to loop a bunch of walkers a turn. Allows you to reuse value creatures too
Creeping Renaissance - return all walkers from your graveyard to hand for 5 mana and again for 7
Plaguemaw Beast - another repeatable proliferate. Should be easy enough to fuel with your token generation
Rings of Brighthearth - copy loyalty abilities for 2 mana. Great with Chain Veil too
Cloudstone Curio - reset your low loyalty walkers by bouncing them when another comes into play. With cost reduction and mana doublers you might even be able to loop a bunch of walkers a turn. Allows you to reuse value creatures too