That's why I tell everyone to leave the park from noon to 4pm and go rest at the hotel room. Everyone shows up at 11am, and they want to do the most popular rides. So from noon to 4pm, the parks are jam packed with people, especially during the summer months.
Don't fight these crowds, even if you have FOTL. It's hot, walkways are packed, and there's no reason to be there from noon to 4pm when the parks stay open until 10pm. Go back to your room, rest, visit the pool, and go back to the parks at 4pm. Now you can use your FOTL and get walk on rides, then watch the fire works at 09:50pm.
Do the thrill ride tour of IOA in the morning, ending with the water rides. Doesn't matter if you get soaked, you're going back to your hotel room to rest. Then come back at night and enjoy the park with all the lights on.