Congrats on reaching the water! That is a great strategy for clearing the game.
One small tip to add, Grampshell does not increase restore cell spawns, only resource spawns. For water runs specifically, it can be more effective to use a turtle with higher base stamina instead. Also, once you have maxed Power from the Dojo and Relic Power, the Titanium Pickaxe is usually the better choice for stamina efficiency. The Diamond Pickaxe is still better for resource-hunting runs though.
Thanks for sharing your strategy and good luck to everyone still pushing for water!