[Q] S-OFF & Root topic

I am having HTC One M7 4.4.2 and I want to root it and S-OFF. Because I use it international and cannot update without CDMA, also too much bloatware from Verizon. How can I get root? I installed weaksauce 2 but when I install SuperSU it fails. Also is firewater working? I have a copy of firewater that I used for my M8 but when I follow instructions nothing happens...