Any mods that prevent AI declaring war on major factions?

So I'm keen to do a playthrough as Skarbrand where the goal is to get every single Legendary Lord Defeat Trait, the Sword of Khaine and Nemesis Crown as just a fun personal quest, and then see how he does soloing the Ultimate Endgame Crisis without an army.

But the problem is that playing as normal, some of the Legendary Lords are guaranteed to get their faction wiped out by AI before I get to them.

Anyone know of any mods that prevent anyone other than the player from declaring war on major factions, or otherwise keep all the Legendary Lords in play?