Looking good Xcali. Re number of squares; do you have an idea of the 'actual' size of the area, i.e. is 100 feet x 50 feet, 200 x 100 and so on. Is the 'boss' a large creature or more or less human-sized? If the map segment is intended to be used for an encounter generally you would use 1 sq per 5 feet but it depends...if the area is very large it may be better to have 1 sq per 10 feet.