Devourer scaling over time (like RoA)

Though devourer can sometimes be a bad choice if you're behind, it is can quickly escalate to ridiculous levels if you get an advantage and know how to use it efficiently. The whole point of such an item is to make it scale well into late game, but the limitless stacks on it can get ridiculous on in certain situations (Warwick, Master Yi, Udyr, etc...). It also forces junglers to stay in the jungle more often instead of actively trying to game and help their team (especially if they're behind on their stacks). Devourer is often either a really good buy or a really bad one depending on how the game is going. I think it would be better to give it scaling over time like Rod of Ages. Heck, give it both? Scaling over time with the option of farming camps to get more stacks. It would obviously stack only up to a maximum, but it would remedy the problem of it getting out of control, while remaining a item that scales well into late game.