Suna's Desert Spada can hit a Kraken up to 25 times if you lure the Kraken into the corner of the hill right before the Crab Cave. Using this method with Suna can deal about 2000 damage per hit. Pika, Magu, Goro, and Mera Mera no Mi are considered to be the best fruits for Kraken farming due to their high damage.