Alright, I think I got my Conquest 26 lunatic pretty close to down. There are two wings you can take to get to the end, and I can get through the east one
just about every time without taking any Hexing Rod hits. I also have a setup that can tank the bottom room forever and slowly chip it down, but while I'm doing that two reinforcement waves spawn elsewhere and dealing with those has been tricky.
Once I get that down, and I will, it's just a matter of deciding whether I want to try to take on the west wing as well. I can just park someone on the throne and seize it the second things get hairy, but I'm not sure if I should take the time to figure out how to fully clear that part too.
I may just plan on creating an extra save afterward and re-trying if it looks like I'll need the extra experience. I can probably level cap just about everyone on the last castle invasion and maybe even squeeze out one more paralogue though so that may not be necessary.
Edit: God dammit, the game knows the jig is up so it's compensating by ending every one of my runs with a random sub-five-percent critical hit. Thanks video game. Three runs later and pretty much my whole afternoon is gone.
Meanwhile, I have no fewer than four female characters grinding up relationships with Niles as hard as possible. They're all B-rank and I don't know how far in any of them are, so my hope is that I can get at least one to A and then use a Seeds of Trust and the last castle battle to get them up to S. Not even sure it's possible to get to S in one battle, but if I can't it's no huge loss.
Edit edit: Oh. Huh. I just had a kind of weird loss. Had the reinforcement waves that were giving me trouble on lock, and had Corrin+Leo and Mozu+Xander tanking the entire south room at the chokepoint in the east entryway. I had the math worked out so that I could tank for quite a number of turns before theoretically running out of Physic staves, but by then I would have the reinforcements dealt with and would be able to regroup and rush the room. I realized at the last moment when one of the Berserkers took on Corrin that if I got a Dragon Fang activation he would die and clear a space for another Berserker to get in, which was more damage than I would be able to tank. So of course I got the Dragon Fang and lost an hour's worth of playtime. Ugh. Guess I'm gonna have to disable Dragon Fang, which sucks because it's really useful when tanking the Generals. Just run-endingly bad when tanking the Berserkers.