Temur Battle Rage can give your entire team double strike if you target Zada, and theyll gain trample if theyve been beefed up in some way
If you want your Treasure Tokens to enter untapped, Amulet of Vigor and Archelos, Lagoon Mystic are your best bets
Deaths Shadow decks turn the former into a benefit, and are arguably the best home in Modern for such a card
If Squall isn't your commander, you can copy its trigger using The Peregrine DynamoThe Peregrine Dynamo, and then sacrifice Dynamo and return it via the copied trigger
If the opponent to your left chooses to copy Barroom Brawl but not change its targets, both targets will probably be illegal as the copy tries to resolve (at a minimum, both targets would have to survive and switch controllers in response to still be legal targets for the copy), and the player to their left will not be able to copy it