We dont have the time to do that and use crown at the same time to get info or asking Mabs help to get troops, also getting the antishaping charm is always critical you fool. We are gonna get targetted by the fallen, the yama kings, the red court, the walkers... and you think that repairing the only fault in our built with wood instead of Titanium is a good idea. Also when dresden killed her there was a fucking global ritual taking place so it's probable that most of their mages were using so much energy that they didnt have time to curse Harry to death. We are entering a place full of red court mages and they only need to be Lucky once in order to defeat us.
Stop. You are conflating multiple things. Some of them flat wrong too. Let's separate the things:
1) We are going to be ambushing Red King's daughter soon, likely tomorrow. That's an ambush. While she probably will have bodyguards, we are not storming the heart of Red Court's power. The meeting is either going to be in naagloshii's den, or in neutral territory.
We alone are a drastic overkill for this fight. With naagloshii fighting alongside us, or even a three way fight, that's even easier. I see no need for shaping defense here.
2) We are going to be a target of multiple factions due to our kingdom. That's not an immediate issue. Those are immortals, the first thing they are going to do would be to gather information about us. That takes time. Some of them are capable of lightning chess, but the only ones to who might know they need to act fast by recognizing an exalt for what they are, are denarians and walkers. And denarians are bound by rules and we have backup in Michael. And we have spooked walkers.
The simplest plan (kakuri ambush) still took more than a month of prep. And it drastically underestimated us. More complicated plans require more prep time.
This is an issue, but we have time here. Buy CCoP, craft shaping protection, then buy perfect.
Relying on perfects only is counter productive, self defeating even. It flashes our ace in the hole early and forces intelligent enemies to adapt, such as developing mote tapping tactics.
There is a reason why nuclear power nations don't disband conventional military.