What other possible lane configurations are there?

Top is a tanky melee with the occasional mage Jungle is usually a tanky melee with good CC and clear speed Mid are assassins (mostly AP) ADC is a ranged physical-damage-doer Support is usually AP, with lots of CC to poke/defend adc.

Furthermore, ADC's get the CS because they rely on bought items to do damage, while mid lane needs levels to do damage (therefore is sololane). A strong bot lane leads to dragon control, and a jungler helps space out the lanes, and exploits the jungle of gold.

I take it that this meta has seen play since season 2. And so I ask you, boards, what other possible meta configurations are there? What are your ideas on it?

What I have seen:

River: Usually played by , replaces the jungle role. Starts ganking as soon as the game starts, brings + for kill pressure. Attempts to get every lane snowballing. Usually doesn't farm camps.