Dont buff JG, its only going to make the bad lanes in the game worse (TOP/ADC)
Its a known fact that most ppl in high elo and pros have been saying that top and adc are the worst roles in the game by a large margin when compared to the other 3 roles (there was even a poll made lately that you can check out if you want).
Buffing jungle only makes those 2 roles fall even deeper into the pit, dont do that riot, NERF SUPPORTS, nerf some mids, dont buff the jungle.