Only issue with 7 arty vs one I posted is minimal self healing because you at least get repair critical, cold iron weapons, thundering armor and lightning motes with 9 arty, and I am not sure you add much with 6 rogue since you get insightful damage anyways. Plus if you want to melee as a barb, just switch dex and str as I mentioned as the only thing dex or str provide is "to-hit" with either range or melee since you have insightful damage and insightful reflexes. Rage would have no benefit on range and provides a boost to crits when meleeing, but if you have to dismiss often to heal and run out of rages, you still do decent damage.
The AA barb looks like a decent option, but again druid you cant cast while raged and you are gonna run out of rages. You could not rage, but your gonna be lacking in DPS compared to the 9 Arty/ 2 Rogue / 9 barb.