Played an Ard Boyz practice with my HE against Lizardmen. Their Slann took light magic which turned out to be fantastic. He managed to get timewarp and speed of light off both at the higher value on turn 4, it won him the game.
WS10 I10 Saurus warriors are really really good. Hell most things get good with hit on 3 and re-rolls.
I am beginning to think that Light magic is considerably better than life for the armies with low I and it is just insane good for Lizzies.