For anyone still stuck on the Wifi tethering issue, I've found a solution!
I downloaded the latest version (version 3.1 beta 11) and it appears to be working great!
I think this is the 3rd party app that Oodie had included in his ROM...
Maybe this could be included in the next version?
Just the camera issues to work out and I think this ROM would be perfect!!!
Phone: AT&T HTC OneXL Evita
ROM: ViperXL 4.2.0
Android Version: 4.2.2
HTC Sense: 5.0
Kernel: ElementalX 8.2
Hboot: 2.15, S-Off