Nautilus buffs? Lol.
News flash Riot, Nautilus needs help in the first few early game levels, not a couple hundred more potential shielding at level 18. Nautilus' level 1-4 jungling is trash. Even if your team sticks around and gives you a huge leash on the frog, by the time you get done with wolves you have to back to heal because his godawful attack speed can't clear camps.
Solution: some way of keeping the shield aoe damage buff up longer. Either give the level 1 shield more HP (Nautilus isn't going to be ganking pre-lv4 anyhow.) or allow the damage buff to continue even after the shield pops. If you have to nerf the damage a tiny bit, fine. But he needs something to help that first jungle clear.