To clarify, when you said displayed in-game, you are referring to the level preview screen correct?

Seems like the real solution is to make it easier to see the full list of requirements of the talisman in-game, ideally in-level.  It could be something as quick-and-dirty as a popup window that can be activated with a hotkey or something (and would automatically pause the game as well before showing the window).  A popup window with a single multi-line text box with vertical scrollbar would make it possible to read all the words of a very wordy tasliman.

It's a fair point that even when they can be displayed properly, very wordy tasliman requirements are still annoying to look at.  But also probably not happen too often assuming the level author isn't intentionally trolling the player.  Maybe there's a case to try to optimize in particular for the "N of everything" case, so that when that case is detected, it could just display "at most N of each skill" or similar shorter wording, instead of calling out every type of skill.