Hydration is the key to survival while fasting. Of course, we all have glasses and glasses of water (or at least we should) at Sehari and at Iftar but consuming vast quantities of water sometimes means that it is being flushed out of your system really quickly.
In my experience, having food with high water quantity is always helpful. Having fruits and vegetables (and include vegetables) both at Sehari and Iftar helps a lot.
My go to fruit for Iftar is watermelon, it is really hits the spot. I also have loads of fruit chaat which I love.