Just to keep some traction in this thread and updates for anyone reading if they have the same problem, I wanted to throw out what I tried yesterday.
My biggest issue was the "Do Not Enter" sign. Poking around in a few threads yesterday, I saw someone saying they used "fix ownership" and USB inject in order to get past that. Tried that. No luck.
So then I went poking around in the BIOS. I found that, even though I have ECHI as Enabled, xHCI was set to "Smart Auto". I tried to enable that and Clover booted to a weird "grey screen with blue text" called the boot manager, but would not continue to Clover no matter what option I picked. So I changed xHCI to "Disabled" and, to my surprise, the USB got past where it was before! No "Do Not Enter" sign. Unfortunately, I had to run out at that moment and could not watch the verbose boot all the way through, but I was getting a TON of "errors" like "Could not apply fix, value already set to...". I decided to leave it and hopefully come back to the installer screen, alas, when I came back, the monitors were asleep and I could not get them awoken. So that means one of two things:
1. The installer booted fine and then went to sleep due to inactivity and froze
2. The installer loaded, however, it was not able to initialize the graphics (which my card, the 660Ti, has not needed injection from ML onward).
So I am going to try it tonight and see the results.
Disable BIOS/Integrated Graphics and set config.plist/Graphics/Intel/Inject/NO.
I went to the "Integrated Graphics" portion of the BIOS, but unlike Gigabyte boards, it seems Asus does not give me an option to disable the integrated graphics outright. I was able to change the memory size, enable/disable IGP Multi Monitor and enable/disable Render Standby (disabled both), but I could not find an overarching flag for disabling it.
