Used this in a game. 6 branch wraiths joined to a unit of 12 dryads. Ran them 6 wide.

Now I had a level 4 weaver with beasts and cast the upgraded savage beast of horrors which gave me 36 attacks at ws 6 / s 7 / i 8 plus 6 normal dryad attacks.

Just thought people would like to know and possibly try it out themselves.