Looks like air superiority is more important than sea domination in games like this, particularly where victory condition is just commander assassination. It seems to me that commander should be defended heavily both with AA and shields. GG to learn what could happen otherwise.
Get a fast T2 air factory, upgrade ACU with T2 suite + cannon and arrive at second main isle at below 7 minutes, almost as fast as walking and you will be able to overtake it easily + build T2 PDs and shields against naval.
More engineers to reclaim is also a good thing on this map, there ~6000 mass and ~50000 energy to reclaim for every player (with 6 players).
A really hard and close game.