The most challenging maps for you.

Chingis, of course, I agree: it's generally not good to kill women, and it's even sadder to kill beautiful ones! ;) But, as you yourself say: for skill improvement, it's useful to try competing with such a fierce enemy.
By the way, the author (maygwan) explains in the biography of this beauty who she was named after:

Valery aka Salamandre, a most powerful witch and pro HoMM3 gamer.

That is, it's the same Valery who created the "Stargate Atlantis" mod, the "Alexander the Great" map-mod, the "300" maps (based on the film), "The Empire of the World III", "The Empire of the World IV", and others. All of his maps are also available on that site: http://www.maps4heroes.com/heroes3/maps.php?keywords=Valery&type=&size=&difficulty=&sort=2 However, keep in mind that they are made for WoG and contain many new elements (I haven't played any of them, though).
By the way, I also liked that the search there allows you to find all the maps by one author (as in the example), if you enter his pseudonym in the input field. This is how I found another dozen maps by maygwan and I'm thinking about which one to try now.
However, my question to the strongest players remains:
Can you defeat Salamandre, and if so, how, when, and with what army?
I'll add: perhaps I would have needed a few more weeks or months to accumulate money and troops, and then I might have been able to defeat Salamandre, but that's too boring for me, because I've already explored the entire map and there's absolutely nothing left to do there. Besides, I've already captured the only Turquoise city, so she was bound to disappear after a week.