Well, RNG has an A- Skill in Archery according to
Somepage. SAM has a C+ Skill in Archery. So that works out like this:
RNG37: Archery Lv.114
SAM60: Archery Lv.190
So, RNG37 will give you a big head start, but you would still have to level Archery as SAM.
RNG67 will cap Archery for every job that has an Archery Skill. I've been meaning to do this with RDM. Would be easy for me, just Silence Worms, and fire away. They'd never eat through my Stoneskin, and I'd be set for SAM for quite a while.

[font="Comic Sans MS"]Odude
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