It may look biased from the outside, but I didn't set such goals for myself)))

As for the shield and the course, I'm ready to argue.

Roma, not only are you mistaken yourself, but you're also confusing beginners.
Expert Stone Skin - +6 defense on all stacks, i.e., reduces damage by 15%.
Expert Shield - reduces damage by 30%.
Expert Curse - 80% of minimum damage - 1. I.e., for griffins in the Conservatory, damage becomes somewhere between 1 and 2 from an average of 4.5 - reduced almost 3 times; for snakes in the Hive, a solid 1 from 3.5 - the effect is even more pronounced (considering that there's no particular point in casting anything other than healing on yourself in the Hive).