Beyond the auto-includes Sol Ring and Arcane Signet, the backbone of budget ramp is the full cycle of two-mana Signets (like Golgari Signet) and Talismans (like Talisman of Hierarchy)
Treasure Cruise was frequently a part of fast aggressive strategies that might just want to reload, but without powerful enough cards to be willing to pay a premium for the selection Dig Through Time offered
Now you want to use cards like Urza's Bauble to adjust ratios and have as filler cards but back in the day you could afford these slower but more luxurious offerings
Speaking of which, what changes would I make to the budget build of the deck now that we've played some games
Additionally, Ayli can also spend 1 white and 1 black mana to exile a creature, which can help remove an opponents creature from the game
As far as 2/2 Human Knights go, Jean-Claude Vondam is a good one, and can get pretty big, pretty quickly in the right decks