Utilize Nautilus's forgiving grab (Q) to easily initiate fights, isolating key enemy champions for your team to follow up on.
Prioritize maxing your W ability and building core tank items like Heartsteel for durability, but manage your mana as it's high-cost, and avoid prolonged engagements.
Dominate the lane by aggressively pressuring and locking down mispositioned squishy targets with your powerful crowd control from the early game.