I took the Crystal with 3 Angels and 10 Devils, without any losses. As you can see, there are many ways to do it. You can use a Gnome + meat shield + Armageddon. The important thing is who gets to the Crystal first, or if they even get there at all.

Actually, everything is important... those same Angels are needed to further boost the final hero, and the Devils... do you really want to run to that not-so-close place twice? After all, you also need to change the Crystal on the hat!!!

And by the way, where do you get the Harpy?
In the village that is captured at the top?
Added 24 minutes later
What is 2sm4d(3)???

You can get the Harpy by digging up a hero who specializes in Harpies! Then she goes with the heroes through a portal, they raid the upper right corner, and she levels up in Fort Grey... she is taken from there with the help of a fast mage hero with a portal that comes out of the dungeon to meet them, picks her up, along with artifacts and other troops if there are any, and then portals out... and in the village, you need to build a mana doubling structure when the final hero is there, preferably with something on his head... for example, the hat that is lying around at the bottom)))
2sm4d(3) is one of the templates for creating random maps; it has nothing to do with this tournament... it's like comparing a flea to a warhead... ah, I understand, Pitbull's signature confused you))) it means he's really tired of this standard template