You didnt mess up horribly. You can still level fine, it just may take a little longer to max the needed skills I think. You should ask Meimei. Ice Arrow and Flame Arrow is mostly what you need. Also Fast Shot I think, at 65 (Not too sure).
Well, it's been more than a few days since you posted this, so you probably already know, but you'll have more than enough points left over for Piercing at lvl 70, and still have enough to go around for FastWalker and other moves if you'd like ^^
.. Only "bad" thing is, you might not have as many points as you'd like for more PvP based skills, such as Fast Shot and Silent Arrow [depending on your focus, of course; you don't have to max Fast Walker, and move more points from there to fast shot and silent if you wanted]
Well, first, max Fast Walker.
Now, after you did, unless for my theory about BM, there`s no skill that will help you in PvM.
You`ll suck in PvP right now cause if you`ll try to hit anyone, the closest 10x around will 1HKO you.
At 10x+, if you`ll want to try to PvP you`ll have points for ALL Ranger`s skills (said Ranger`s, not acro`s), and on master you`ll simply max all your skills out.
Anyways, Nature is useless, you`ll have enough points to max Fast Walker, and BM too in a few levels if you`ll want, that`s basically it. The rest are either useless or PvP skills.