Designers and printers use the same figure for proxies, tokens, and storage inserts, so planning around these numbers keeps your setup consistent and tournament friendly and avoids any mishaps
With only one copy the random abusive starts are less commonplace and don't make me resent the Delver
As for planeswalkers, any of Ajani's cards may be included, from Ajani, the Greathearted to Ajani, Caller of the Pride and Ajani, Mentor of Heroes (a great pick for tutoring for more creatures or planeswalkers)
I was recently playing a game of Commander with my wife, and these would have been perfect for just that occasion rather than pitting Lorehold Spirit against Food & Fellowship
Double the mana, bump the counters, all sorts of shenanigans are on the table when Dionus arrives
A lot of Dinosaur decks already fill out with a +1/+1 Counter theme so this Dino works great at strengthening it