After playing with the sprinklers a bit this looks like the optimal spacing for the sprinklers maybe half a tile closer.
https://scontent-mia3-2.xx.fbcdn.net/v/t1.0-9/35833490_10204999835993339_1689062469735022592_n.jpg?_nc_cat=0&oh=5a9e5fbfe6e15b8e177bbec87eeae4a9&oe=5BA23740
This is the test i did with just 2 sprinklers i did not use MOO i had already planted these mushrooms then crammed them in to see exactly where it would water
https://scontent-mia3-2.xx.fbcdn.net/v/t1.0-9/35943645_10204999820832960_8351267597278248960_o.jpg?_nc_cat=0&oh=d53020addd84a1cd2c9fecf63e5d5f82&oe=5BB75150