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Imagine this situation: for example, a player actually has only one path to the Guardian Order (GO), but they don't know it yet because the path is blocked by a barrier (but this barrier can be broken, although it's not advisable to do so later). As a result, the player continues to, for example, capture Necropolises or level up, and later, they break through to level 116 and discover that there's only one path to the GO behind it. And it turns out they lost. I understand that this is rare, but it's not impossible. Therefore, I suggest changing this requirement to at least level 117.
Regarding Vidomina and Izry, you are absolutely right; now, they can be leveled up without the internal penalty of losing those turns. In the very last slot, we level up experience, Necromancy, and it's good.