doesnt matter if takes longer or w/e the question asked, was, is it necessary or not?
its not, you can still get to 130 by spamming oblique shot.
to tie into @morks question, barrage is still good for a fletcher to make up for crossfires awkward aoe, the main reason people went ranger back then was for steady aim, tbh i think ranger C2 can be replaced by almost anything. but its still the most straight forward and safest option for fletcher. you can replace it with something like hunter C2 for stronger bossing ability but getting more aoe and a situational damage boost isnt bad.
ranger C3 is not op anymore since steady aim got nerfed, spiral arrow is nice but its cd is too long to do much and bounce shot is not really needed since barrage + crossfire takes care of all the aoe needed
thats why A2 > anything, is the preferred choice for the 25% increased crit rate of swift step, at A3 getting twin arrows is nice, but it wont out dps bodkin/barbed as a spamm ability, fletchers single target is mostly from magic arrow though, bodkin/barbed are fillers for magic arrows 5 second CD