TLDR: At 5 fortresses a day it would take a professor 652 days to finish tree 1, an auror 1171 days, and a MZ 1374 days. Game is going to die even faster if something isn't done very soon.

As more people get in to the upper 20s-30s, we're getting to the point where there will be no nodes on the profession tree that you can unlock with only scrolls. Red books become more and more difficult to come by due to the linear increase in xp for challenge ranks. Green books are event only. So you have to wait for week(s) until the next brilliant event or grind for hours at a fortress for red books, each book taking longer than the last to acquire.

The cheapest red book class (Professor) needs 260800 challenge xp (thank you u/eayney ) which at 80 challenge xp/fortress would take 3260 fortresses. If they take you 5 minutes each that's only 11 solid days of grinding fortresses. It's 23 days for MZ's!!!

There really needs to be a red book fix implemented sooner rather than later. Possible solutions:

• Allow a one-time free respec. Charge 200 coins for any other future ones. (More of a bandaid than anything. A lot of people made stupid decisions early on before knowing what they were doing)
• Change the rank at which challenge xp is capped to advance
• Put red books in port keys
• Update the achievement rewards to include red books (give them to the people who already achieved them as well)
• Allow a trade of scrolls to red books 5:1 at the cost of a coin? 8:1 no coins?

Grindy games are fine, but you need to have a way the general player base can continue to enjoy the game and it's going to come to a halt real fast if there is no character progression or you need 5 hours to increase 1 node.

Edited to add other solutions from the community:

• Increase books per challenge rank at certain rank(s) as is done with scrolls already.
• Update daily rewards. Possibly change a scrll reward to a book. Or add a new book reward.
• Change final daily reward for all tasks completed to a red book
• Add possible weekly rewards
• Add a walkable pet that could include a red book reward
• Choose a family which you can treat as a home family which would reward points that could grant you red books or easier catches for that family
• CXP potions
• Raids with CXP