I mean, new characters have 0 tech researched which means EVERY faction is pissed at us.
Diplomacy tree is too broken 'cause it lessens the hostility.
I spent like 5 NG+ runs so I can train my MC and learn SPECIFIC skills that are always prioritized for solo-carry.
Reimu seals my skills so I usually avoid her but I can overwhelm with stat checks and many troops though.
Forget paying them 1k per turn, the other factions will spread rumors about you anyway so all that favor goes down the drain unless you can pay 5k+ per turn.
Strats like this only work once you've researched far enough in one or two trees, well more into diplomacy tree part anyway.
I usually just put my officers to the most vulnerable territories to attack with at least 10k troops to defend while I just rack up cash.
They can fight once then the next turn, it's a ceasefire and they can't anymore.