Of course, I'm not here to complain. That would be silly. I am here to offer solutions, Three solutions specifically, and if they work out, that's great! If not, oh well I tried. So without further ado, here are my three solutions to help make the site economy a bit more reasonable. Please note that this is based on my opinion alone. Also, these are "either or" options. Not "do this AND this AND this".
1)Lower the Spell prices
I can't get much more straightforward than that. Simply Lower the amount of jewels it takes to Learn spells. Now, I say "simply", but admittedly this is probably the hardest of the three solutions to implement. Numbers could start getting uneven, and it can be hard to determine just how much of a drop it would take to balance things out. So while this option is a bit more impractical the way the site is currently set up, it is an option none the less.
2) Lower the Class spell multipliers by 1 tier.
Let me start with the disclaimer that I completely agree with how the class system is set up. I like how certain Classes are better with certain spell types, and it offers many different play styles as an RP guideline. That said, I think site economy could benefit from dropping all spell price multipliers down by one tier. What do I mean by that? Well, everything that says 0.5x drops to 0.25, everything that says 1x drops to .05x, 2x to 1x, and so on. This will essentially do the same thing as just dropping spell prices directly, but with more precision and the even numbers on the price tags remain. What's more, classes will all keep their pros and cons as if nothing changed, AND most if not all classes will get their own spell discounts instead of JUST clerics and Battlemages. In my opinion, this solution seems to be the best long term solution
3) B Rank quests
Honestly, the root of the issue might just be that there is not enough of a stable income source to support such high prices. You could just release B rank quests, or allow members to make them. That way, the people who can even get the expensive high rank spells has a way to get the money. There are only so may quests available right now, and while you could make your own (as I and many other have) for some extra change, that can only get you so far. Of course the downside to this is that it only effects those of us that are B rank and up, rather than the whole site together in addition, this will only fix things until A ranks get the same issue. Still, B rank quests DO have to happen eventually so...
TL;DR
You could lower Prices directly, lower Class multipliers, or release the B rank quests. Basically.
Thank you so much for your consideration and for taking the time to read this block of text. I'm really bad at ending things like this so... Bye~!
P.S. I thought of this after the fact, but you could also allow members to directly upgrade spells they already have to higher ranks at a discounted price. That might help a little too.