When arrived on the Ruins Island(Monster, Titano Island) noticed that could still Warp!
If could Warp, then the Boat isn't needed anymore, and could arrive at the Mainland in an Instant.
At the Water Sanctuary there are many Frozen sites, had to walk, or run on a Frozen bridge!
The Icy bridges were too slippery, to cross them had to go near a wall, or try to slide straight in a line.
The quality Water can be easily obtained here.