Give app resource priority?

I have a couple apps I use regularly that take a *lot* of resources, the biggest hog is Vainglory which being essentially a desktop-class game uses most of the ram, CPU power and network bandwidth my Galaxy S5 has to offer when running. It works fine most of the time, but occasionally while I am playing, the operating system or other apps will start doing things in the background causing my framerate and ping to drop dramatically. Also when the app looses focus, even for just a second, it has to reload completely due to the large amount of memory it requires. Is there a way to tell Andriod to give high resource priority to particular apps and prevent other applications and processes from working in the background while those apps are running?