Would this be a good combo?
Turn 1. Set Umi, Tornado Wall, Mystical space Typhoon, and a Maiden of the Aqua on the field.
Turn 2. Set another Maiden of the Aqua on the field.
Next 6 turns. First, set 3 4- star monsters on the field. Next, tribute them for The Legendary Fisherman, and 2 Deepsea warriors.
Turn 9. Flip up the 2 Maiden of the Aquas in defense position, and the other 3 in attack position. Activate Umi and Tornado Wall.