• It should be possible to invite party members to black kats. Invited party members would get drops.
• When someone goes solo, any black kats in the newly spawned instance disappears. The "kick from party" button is disabled for as long as a black kat is alive in the instance. When a player clicks "go solo" with a black kat spawned, the game should warn them that the kat will disappear.

This prevents duping and encourages teamwork.

The you can EITHER

• 500 ancient pages would buy a book.
• Book can still drop.

I'd previously say that 1000 was a reasonable rate, but given the armours it's not.

OR

• The whisker system would apply exclusively to black kat raiment. Class armours would craft just as easily as the hats.

Alternatively, those armours need a buff to be worth it. The armours are not worth their current going rate of over 18k energy.