The calculation takes into consideration of your clones atk, def, hp monster atk, def, hp and amount of clones, it also changes really fast. Tooltips have to be precalculated before they show. If I would show the cap for all monsters on the tool tips, the fight page probably would need 3 times as much cpu power as it needs now. So I can't really do that.
Hi kingrata, unfortunately we had to move from dropbox to itch.io as our bandwith immediately ran out and this resulted in all progerss being lost. Really sorry about that!
Highlight the passive you want to buy then click the amount. Let me know if you have any issues. Thanks for the comment