I built this deck for the challenge and played it a few times over a couple of years. I've disassembled it (and sold some of the pieces), so I'm not looking to update the list. However, I've gotten some really good suggestions that I feel are worth noting for anyone looking to build their own filibuster deck!
Proliferate: A few people mentioned using proliferate to get the counters quickly and I think this is a much better way of doing it, it's just not the flavour of this deck. I really like the look of Flux Channeler for being able to quickly trigger proliferate since most of the spells in the deck are noncreatures.
Energy Field: I overlooked this little gem when I originally built the deck, but it fits perfectly. If you pay the buyback cost for Walk the Aeons you can even take extra turns without having to sacrifice the Energy Field.
Icbrgr mentioned a turbo fog version that I think sounded really strong. It used cards like Holy Day, Dawn Charm, Ethereal Haze, Kami of False Hope, and Batwing Brume to stall the game and prevent damage, along with Paradox Haze to get the requisite filibuster counters.