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Well, I wouldn't argue about the "limited" experience of Greta. Before meeting Clemira, she's level 29, and with artifacts, her stats are 15, 28, 20, 44. Carlam had even less experience, considering the secret paths, until he had to defeat 1600 dragons while fleeing from a demon. In battle, druids further boost magic. As a result, the battle with

turned out to be a walk in the park. Mentorship with Carlam is developed through magic attraction – it's a very useful skill not to ignore. And then, you can reset the mentorship with the mentor to level up the guardian of secrets.
Maybe

with his summoning ability should be limited? Otherwise, he blocked his own black dragons, and I had to fight my way to them because I couldn't defeat them with magic.
Remix, check out my replays on the second page of the thread. And this is the first attempt at a playthrough – it could have been done more carefully. A nuance of Carlam's mentorship is that after meeting him, Greta remains at level one. The experience gained is distributed the next day. If, on the same day that you pass the experience to Greta, you don't go down a secret path (and Greta isn't passed on to you), the skill distribution the next day will be done by the computer – and then you'll just have to "take what you get." And I recommend clearing and purifying as many outposts of the forest alliance as possible with Carlam – Greta will then get a lot of free troops.