The sideboard does help, with multiple copies of Cry of the Carnium, two more cheap removal spells, and flyers that can potentially gain life and interact with their threats
Smothering Tithe in particular plays very nicely with this card, letting you draw a card on each players turn in a Commander game
Tropical Rainforest Jaguar Lair doesnt really work as youll probably be removing damaged characters
Plus, keeping one mana up as a Blue player is a completely natural thing to do, and just the threat of this card will have your opponents reconsidering their life choices
For Yuna, Hope of Spira to literally resurrect summons and other enchantments in the way that it does is borderline uncanny
We will attack with him often, and we will attack with him hard