I feel like it would be a very interesting mix but I can't think of any. I don't play either of those genres very much though, so I might be missing something very obvious.
Do you think it would work well together?
It's basically an action RPG but the way they you get around the world is parkour and there's a skill tree related to free running skills. It's a phenomenal system. I prefer the first one to the second.
Its like superhuman parkour by the end too. Basically spider man. And if you really want to shit your pants, there challenges like the bozak horde and other special locations that can be pretty scary and heavy on the parkour.