The cards in Feline Ferocity that most help the Go Wide strategy are the opposite of what the Go Tall strategy under Arahbo, Roar of the World wants: in this case, we want anthems that beef up our entire army (Hungry Lynx), cards that have triggers when a creature enters the battlefield (Qasali Slingers, and cards that care about the number of creatures we have (Kindred Summons)
The first is self-Mill, where you put your own cards into your graveyard
Sophia, Dogged Detective is your back-up commander
Pikachu has the following attacks: Gnaw - 20 damage
Its an elegant high-end pull that fits both binder displays and tournament decks, a crossover of play and prestige
Couple that with the instant-speed availability of Survival of the Fittest's activated ability, and it all combines into a card that can rapidly turn all the creature cards in your hand into the perfect combo assembly necessary to close out the game