Are there any Ranger skills hard to get now? Hardest Ranger elite was Prepared Shot and if it gets easier in GW:EN then, now, everything is easy to cap.
Most of the good ranger elites are pretty easy to cap depending how far you are in each campaign. It all comes down to what you're wanting to do: farm, B/P groups, interrupt, degen, etc.
You could always sell it and buy a bunch of signet of captures.
Ide say ALL OF THEM or atleast thats what I am doing with my ranger. Because sure get the one or more that you will be using with your build whatever it might be, then spread out and cap them all, that way you won't be scrambling when you decide to go another route and do not have that certain ELITE you want/need.