Buy a aftermarket cooler. Then use the AS on it. I wouldn't even bother putting any other TIM on it. Don't let the smoke out k?
Alcohol from the walmart is fine for general non-professional un-experianced users. Artic Clean is the best stuff ever to clean any part for TIM and TIM tape application.
Step back, put factory clocks back, buy a new HS, then play. You have alrady passed what the peeps recommend on that chip except for benching runs.