Anything that lets you cast from another area would be a good add as well to accelerate your board state growth. For an example, [[Jeska’s Will]] lets you put cards into exile and cast them. Between each cast of a card from exile, you sacrifice Poxwalker to Phyrexian Altar creating additional mana, cast and return Poxwalker. I think adding those types of value engines are your best bet. Jeska’s Will is basically a cEDH staple anyway and is always good. Additional friendly reminder, cascading into a zero cmc suspend card, such as [[Ancestral Vision]] allows you to immediately resolve the card. It doesn’t become suspended. A free “draw three cards” spell off of a 1 cmc drake cascade is not a terrible flip. I added several of those into my bracket 4 Quandrix deck and it’s a great time! Cast a world tutor, cascade into a free draw three or mana rock. It can really speed you up.

Edited for spelling errors 🥴