Quoting 25Atan, reply 11
Mid game i'm using scrolls for 70-110 damage, instant cast, hitting at least 6 units. Late game easily hitting for 150+ damage AoE. Wiping towns in basically one turn apart from 2 units for 90 gold. No one runs frost resist so it's basically never reduced and when it is resisted, hits for a mere 45+ mid, 75+ damage late game.
Note that there are other ways of achieving comparable effects. I ended my last game clearing cities with flame wave for a fraction of the cost of your scrolls.
In all cases, though, you have not only the per-battle costs but significant supporting investments.
Let's take a quick exemple:
Flame Wave turn 130: cast time one turn, hits all targets on battlefield for 20-25 fire damage (admitting you are very lucky with fire shards), cost 40 mana, consolidated damage: 130-ish, probably reduced by fire resisting units.
Blizzard Scroll turn 130: no cast time, hits only up to 6-8 clumped targets for 80+ damage (admitting you are not very lucky with water shards), no mana cost but costs 90 gold, consolidated damage: 630-ish, probably not reduced by frost resisting units since there are rare to say the least.
I could make an estimate for turn 230 but for flame wave to catch up in damage with blizzard you were probably over turn 400 and even then...
Usually gold is not a problem by turn 150+, so I slap some scrolls to quickly deal with deadly+ groups.
I'm not saying it's unbalanced, i'm saying it's stupidly overpowered. 90 gold is basically nothing.
Air elemental Scroll costs 130 actually after doublechecking it. People talk about the adventurer's guild (with reason) but this is worst imho.
I also don't see many opinions on what scrolls could be added to make the scroll scribe feels more relevant. More scrolls? Scrolls of spells you master only? Limited number of scrolls? adjustment in price? Cast time on higher level scrolls? Cost in crystal?
As it is now, the scroll scribe is the best option for a level 3 conclave (boost research and grant access to blizzard scrolls) so buffing it or giving it more options might not be the wisest of choices, yet I reckon there is great potential for it to become a mage's place.