This is not a question of strategy, but rather the journey.

How long/many attempts did it take you?

I've heard it is borderline soul shattering to finally reach, but I am determined to reach it (the highest level I've reached as of now is 63) but I am getting a tad discouraged.

Anyways have a good day and be excellent to eachother

Also is Game C a viable Kill Screen Run? If so can I propose it for a new catagory at some point in the future?

To answer your question, I had played several zapper games at a high level for a little under a year before I got the kill screen. You're not wrong when you say it's extremely difficult but the soul shattering comes when you miss a duck in the 80's or 90's. I could make some fantastic story about my journey but I got it after grinding for 5 days or so with all my zapper experience. And for the second part, Game C loops after round 99 and I'm only aware of one person doing that with video evidence. GG on round 63, don't be discouraged

Here's Kyle Nelson's clay high score

I did not know that it loops, that's kind of a bummer