Searching for the Rune Sphere (remake)

Thanks for the tip about the Prophet. I took a risk and rushed to the cloak, and then to him. And, lo and behold, I managed to get there without losses and prevent the second hero from taking the Castle. Now I'll continue playing. But the experience situation is still worrying (I should have just set a limit).

Added 21 hours 51 minutes ago
I tried going to the Dwarves and realized that it's pointless to continue playing. In three months of intense battles, my main hero only leveled up three times, reaching level 15 with corresponding stats (17-8-2-5). By the way, increasing morale by 10 for capturing an Elf in battles somehow doesn't seem to have an effect. The Dwarves, on the other hand, have almost all their heroes around level 20 or higher, and they have a ton of troops. For example, in the nearest (northeast) Castle, I encountered a powerful hero with 40 Dragons, 60 Trolls, and other troops in increasing numbers, plus a guard of 800. Even if I start accumulating troops (from two Castles; the third one on the island is not convenient), their growth will still be less than that of all the Dwarves, plus inevitable losses. And in the finale, there will definitely be a tough battle. In general, without returning to the standard experience gain model (and the portal to the city), the game is, in my opinion, inherently flawed. Maybe it's possible to adapt, but this hassle is not for me.