Water mono on Reborn? With those first 2 gyms? Good luck man you'll need it (lots of it ) you know that you can also get Finneon, Panpour, Surskit and Lotad before the second gym right? The last 2 might be useful against Flobot. As for the future Pokemon i can recommend: Sharpedo, Vaporeon, Kabutops, Empoleon and Swampert.