Slaughterhousers are absolutely awesome with Mohsar. With Sunhammer, I can ensure that all beasts/jacks are damaged when the slaughers go in. Also, they RFP, which is big against Asphixious and anyone who collects souls. (mirage can be cast on them, they just cannot be used for sands of fate.)
Not sure they would be great with morvhanna, but I just want to make sure I have something that can deal out punishment. Bloodweavers are also great, and are more self sufficent. I agree about the single grove with her, I just had 1 point left. I do like the addition of a blackclad.
Also, as far as Nuala, Having quickwork makes the unit much, much better on Morvhanna feat turn, Charge, kill a target, throw a jav, reform back behind the forest you jsut made.
another Idea I had for list 2 was
eBaldur
-Megalith
-Ghetorix
-Woldgaurdian
Celestial Fulcrum. done! (in this case I would drop Megalith from the Mohsar list and add a regular woldwarden, maybe drop the blackclad for LoTF