I suppose it depends on when you’re farming him as well? At level 30-40, he shouldn’t offer blueprints to craft Level 70 equipment for example so that should help in cutting things down. Getting the Aldur’s Inquisition blueprint would still be a challenge but at 94, it’s lower priority compared to the Luminari set.
I can’t remember how many blueprints he sells on average but if you’re rift hopping between 2 other vendors around the world (both of the ones at Devil’s Crossing might work for this before starting AoM? Needs testing/verifying), then you should be able to refresh his inventory often.
Edit:
Was able to track this post down that seems to go over when he starts selling certain blueprints and it’s trickier than I thought:
@tqFan For someone playing SSF, it might be harder or require some testing/anecdotal evidence then to se how easy/hard it is to pick up the right blueprints.