You're a freeform GM.
Freeform GMs hate fair mechanics by default.
This isn't something against you, it's just a basic fact of how these sites work.
I mean, if Nasuverse worked in numbers then that'd be great, but it doesn't so yeah.
If systems with freeform aspects frustrate you then I've got to wonder why you're here and not playing tabletop or something.
So since we all know some serious shit is about to go down, exactly what is our threshhold for Church involvement like in F/Z? Will a certain amount of collateral damage from any one Master earn the Church's ire or does it literally need to escalate to "Cthulhu is attacking the harbor" before anyone does anything about it?
Because I distinctly recall giant frikkin' lasers and a couple of nuke-level explosions (or at least a MOAB) being deployed in the Fifth Grail War and the people of Fuyuki didn't really seem to notice or give a shit. Only reason I'm asking is because I'm pretty sure no one wants the Knight Captain or that DAA on their asses because of this (and let's not kid ourselves, we all know this brawl is gonna be collateral damage-tastic).
The Knight-Captain severely outranks the Overseer, since he's just an Executor, so she'll only do stuff if she thinks she should, which is Lax's choice.
As for the Overseer, he'll put out CS rewards for killing someone if he feels they're a threat to the war itself; otherwise, he probably won't do much.
The DAA will probably just punch you if she thinks you look fun to punch. I can't speak for Est on that.