A note on the shifting rune. If you combine it with an owl bear claw talisman, you can get even more versatility because you know when you will crit, you can just shift your weapon into whatever crit spec works best for that time (probably pick or flail). You can also shift into various weapons for their properties, like parry or the various athletics (with Athletic Strategist).
I'm not sure if these would change the rating as it is rather situational, but it might be worth mentioning.
