The compatibility issue between Hannibal’s mods and the original campaign.

I'm writing from my uncle's account. Can anyone help me? I have the Master Hanik mods installed, which change the heroes. Because of this, in the "Will of Ashtar" campaign, you can only recruit Kaspar, as he hasn't been changed. And because of this, I can't complete the last mission because I need 4 Necromancer heroes to perform the ritual to lift the veil from Holyflame, but I can only get 2 heroes: Ornella and Kaspar. I don't count Oranthir. Maybe it's possible to change the campaign to allow for 3 heroes and add more heroes. I just don't know how.