Preheat oven to 325 degrees F (165 degrees C). Spray 2 baking sheets with cooking spray or line with non-stick aluminum foil.
Whisk maple syrup, vanilla extract, cinnamon, rose water, and salt together in a bowl.
Mix oats, rice cereal, coconut, cashews, raisins, dried blueberries, pecans, almonds, dried cranberries, and brown sugar together in a separate bowl. Pour maple syrup mixture over oat mixture and stir until evenly coated. Spread oat mixture onto the prepared baking sheets.
Bake in the preheated oven for 20 minutes; stir and continue baking until slightly crisp and lightly browned, 15 to 25 more minutes. Cool on baking sheets before serving, about 1 hour. Store in air-tight containers.