Wizard – “Liberation” [Campaign 6, Mission 2]

It seems that at the beginning, only heroes with decent armies appear, and later, mostly weaker ones, although Elementals are available if needed. Taking two Necropolises is easy... Al-Safir, with four garrisons in the right corner, can be taken by breaking through them and moving forward.

Added 2 minutes ago
Oh yes, don't delay capturing it too much; in Al-Safir, there's the Tear of Ashi and a higher growth rate, but there are no Gremlins, and there's also no hero, only troops.

Added 2 minutes ago

Enemy heroes come from both sides.

They should only be coming out from the portal.

Added 21 minutes ago
And don't forget to take Banish before it's too late; it will be difficult without it.