I've always wondered why Samurai never got access to Archery Trials and mentioned in a past thread. It would seem only right that Samurai get to build a Bateleur or any on the other Magian Bows.

Your proposal has a lot of good things going for it, and I'm sure no Ranger would complain about SAM getting Archery skill raised to B-/B+. As for weapon skills, I'd probably leave some, like Sidewinder and Arching Arrow, as exclusive to Ranger--they are the experts, after all.