Well, the Amber Spear has S6 and Multiple Wounds(D3), and the upgraded version is S10 Multiple Wounds(D6)
Lore of Lights's upgraded Shem's Burning Gaze has D6 S6 hits.
Lore of Heaven's Urannon's Thunderbolt also has D6S6 hits.
so which one would be better? Amber Spear or the one of the other two who are practically identical?
I'm myself leaning to the Amber Spear, for the S10 hit. Get that off and nearly any model will be whiped out in a single spear.
though on a whole I might also add the spell from Lore of Light, called Speed of Light, which gives WS10 I10. Making a block of Saurus Warriors pretty much the most destructive core-unit in game if I can get that off. Surely I'll kill a lot of Clan-rats with that as a bonus, right?
so on a whole, I'm now doubting between Lore of Beasts' Amber Spear, and lore of light.
((B.T.W. I always use the slann-build where he knows every spell in the lore :3 I hate leaving something like that to chance))