Overgrowth on tanky junglers (why it's not viable)
IMO Overgrowth is not viable on tanky junglers because it is not working properly and takes way too much time to stack. A few patches ago Riot made it so that each camp is worth 4 monsters and I thought that Overgrowth would work that way: 2 camps = 8 monsters = +0.2% total hp, but it doesn't! After testing I found out that the stacking only works by killing 8 physical monsters, no wonder it takes so long to stack in the jungle! That also explains why this rune is alot more viable in lane than in the jungle. Therefore, I think Overgrowth could and should be made viable in the jungle by ajusting the stacking with the actual monsters value per camp.