Honestly, I've leveled 3 jobs so far and of all the exp parties I've had, I've only partied with SAM a handful of times.

So I'm very unfamiliar with the job. And when forming parties, I don't see many SAMs seeking at all. If they were seeking, I'd have absolutely no problem inviting, even if I don't know the specifics of what that job will bring to the party.

And as far as I've experienced, my white mage picked up invites like lightening. Granted, I haven't hit that point where RDM starts to grab the invites away from WHMs, but still. My BLM got plenty of invites too. My SMN hardly ever gets invites which leads me to form parties instead of waiting to be invited. No one really wants or needs a SMN except when they can't get a RDM or a WHM. :o