So...this happened

she had

Before I begin, I don't normally feel Riven is all that powerful. However, it was a curious game I had in that she mitigated 90,000+ damage and dealt 52,000+ damage. We tried to lock her down but when CC landed she never quite seemed to take any damage. When I normally play against a riven it involves bursting her down in short time windows before she can flash CC the team with her combo. This particular player didn't really get many chances to do that as we kept spread out but it didn't matter, she tanked almost all the damage we dealt. She wasn't fed early and didn't really snowball at first but later was killing our team 1v3 and 1v4 once. I knew she had a shield based on AD but I didn't realize it was on a 6 second CD and had 100% bonus ad scaling. I figured it would be lower or have a longer CD with her having so much damage, high mobility and two forms of AoE CC. I don't feel this gives players a window to deal with her properly. unless they are incredibly coordinated with all of their damage at the same time.

I don't have a problem with brusier builds where she gets semi-tanky and is hard to kill at the expense of damage. I don't have a problem with her combo near killing entire teams if they're foolish enough to group up for her. I don't have a problem with her mobility. I do find it troubling that she mitigated tank level damage while building full AD. She didn't even need much life steal as she just tanked it all with her shield. Is there any reason she gets such a low CD shield with scaling based on AD? A 6 second 210 + 100% bonus ad shield seems a bit much. I'm not saying she shouldn't have the shield (not even saying it shouldn't be based on AD) but shouldn't the window to play around it be a bit longer? Why doesn't it stay fixed at 10 second CD?