No problem! I'm glad my suggestion piqued your interest if anything. Like I said, I've currently only built him in 1v1 Brawl which is a much different deck building philosophy. I'm excited to see if it ends up turning out.

On Arena I have every budget beater and card draw spell in those colors I own for the most part. I usually don't recommend it as a first stop, but in this case, the theme is wide open enough that a scroll through EDHREC is a fine place to start.

https://edhrec.com/commanders/troyan-gutsy-explorer/budget

It looks like Adventures are a good budget option, and Keruga as a companion is another neat direction to go in. Check out split cards and the new Rooms in Duskmourn for ways to get around Keruga, the Macrosage's restriction!

I'm a fan of Troyan, Gutsy Explorer myself. I don't have him built in paper but he's my Brawl deck on Arena rn. His second ability opens up edge case cards like Madness, flashback spells like Deep Analysis, and incarnations like Wonder.

It seems like that might be a major theme for Duskmourn, so I'd hold on for a bit through spoiler season.

I don't know about payoffs for sacrifice, but there's plenty of enchantments that either want to die like Induced Amnesia or have good ETB and then do nothing like the Omen cycle from Return to Theros. Theros and presumably Duskmourn will have ways to sacrifice them, and there are probably enough "sacrifice a permanent" effects to fill the gaps.