There's no real way to tell you what a safe dose is as everybody is different.
If you were able to take 15mg of Oxycodone and 1 mg of Klonopin in the past, then I would start at no more than 10mg of Oxycodone.
Mixing opioids and Benzodiazepines can get one into trouble quick so I'd avoid them together.
If it's a foregone conclusion, then take no more than .5mg klonopin.
Do not redose for several hours and forget the beer. It's not going to do anything except maybe make your stomach upset.
ps
In the future you might want to ask about safe dosages, not a good dose for maximum enjoyment. Maximum enjoyment is not what we're about.