You intend to erase W10 and install Linux in its place?Note: Computer is MBP17 Late 2011 running OS X 10.11.4 & Boot Camp Windows 10, the later I intend to erase.
Your previous link http://www.rodsbooks.com/refind/installing.html which one to choose for OSX on the left panel ? could you elaborate a bit ?rEFInd installs in the OS X EFI folder. Linux will have it's own EFI folder in the partition it was installed. No need to delete anything in my opinion.
Download the refind file for OS X and follow the instruction of this video