Picture
The tower screened by a herdstone
get a lvl3 with foldable tower
some lvl1 bray shaman (I used4), one with herdstone shard
add in a 40 ungor & a bsb

-use lore of shadows on the lvl 1's, and take the default spell as it has the lowest casting value and the biggest range of all default spells (48")
-you put the lvl1's in the tower with ungor (maybe a bsb) and constantly cast the spell to lower bs on shooting units, M on attackers, or the boosted version in combat. as the effects stack you can make the most elite unit of your opponent hit last with rubber lances :D

It's an amazing support (BELIEVE ME) and helped me kill several strong armies. The additional dice granted by the herdstone & channeling really hurt the opponent. He will be unable to stop them all (and you still got the lvl3 wich can have some nifty spells on his own :O)