My usual deck was a nice Psychic one with a lot of damage counter manipulation courtesy of Gengar's Curse, I seem to recall
When you create copies of that Forest, you will be able to keep making Forest tokens and tapping them to make more Forests an arbitrarily large number of times
Just imagine an aggressive Winota, Joiner of Forces deck with Lurrus as a Companion, for example, or a Meren of Clan Nel Toth Reanimator deck with Gyruda, Doom of Depths tagging along for the ride
After you complete the game, Ronald will not appear
You can get most pingers and a bunch of cheap noncreature spells easily and just stuff your deck with Mountains
(Choose any number of permanents and/or players, then give each another counter of each kind already there.) Equip Whenever equipped creature deals combat damage to a player, put a +1/+1 counter on a creature you control, then proliferate