I suspect the comments above were referring to me - I am finishing up a save game from when shards would randomly spawn so I have lots of shards. My sov has like 84 essence and fireball can do somewhere around 160dmg (according to the spell tab).
I amended my comment in the thread, though, because I haven't seen him do 160 but he has done more damage per shot than in 1.06. The AoE spell (Infernal?) often hits for 20+ dmg and I never had that happen before. Maybe it's just that attack/defense has been changed and it's made spells more potent?
In any case, when I started up the game in 1.07 I didn't have any fire shards (had some in my territory, but was holding off to not annoy the AI with "has all the shards"), so when I grabbed my first fire shard and went into combat it appeared to be applying due to that raised damage. Now that it's up to a potential around 160 and it's still maxing out in the 20s, I have to take back my statement.
Although I just did 86 points of damage with a child and she's only got 28 int, so something is definitely different.