Nerf stacked gold renekton

Glacial? Perma stun?

Gold stacked $1 champions can be reasonably strong in the right build. Only a few can carry. I've done what you describe with Diana (+ PD, Claw, Gunblade), can coast to the late game with just that. You'll need backup by then, and 3 completed items already on a unit worth only $5 max...

Just try to build a Red Buff on and ADC or tanky front line, or even better a on champs like .

If he can't heal he should be easier to handle.

I've never had too much trouble with Renekton, I often used it myself, always thought he was good but never seen him as something exceptional.