Old History was always harder than her last spellcard for me. I've had better luck starting outside the two middle "walls" at the beginning and moving towards the center. There is always the risk of running into a bullet at the last second, but it isn't as hard as it seems. Stay either focused or unfocused the whole time unless you want to confuse yourself.
For Iwakasa's Curse, I just stay in one place dodging the spirals, and once the red knives get close, I choose a new spot to dodge the spirals from until it starts to clear up under Mokou again.
Flaw of Forgiving Shrine should be an "always capture". Dodge diagonally through each wave, and just remember that you have to dodge each wave twice. Do it one step at a time, and you be able to stay under Mokou the whole time.
Honest's Man's Death is a tricky one. It's 100% streaming, but you have to dodge TOWARDS the laser, because it doesn't become solid until it reaches your position. If it's coming from the right, just a simple tap to the right should be enough. The problem arises when you have to combine this with your streaming and feinting, but that just takes practice.
If you would like, I can make some replays for you.