It really depends on your hair. For me, when applying product to soaking wet hair, the product doesn't actually absorb into the hair very well. (Hair is full of water, leaving no room for product). I apply my leave in, which is actually a rinse out conditioner, when my hair is soaking wet because I don't want that much leave in to stay in my hair.
I only use leave-in and gel (in that order). As if you didn't have enough choices and things to try, you can also mix your products together in your hands and apply them.
Good luck and have fun experimenting.