Speaking of MoF Hard rage, Autumn Sky and a Maiden's Heart has been the source of many ragequits.
It's the reason I only reach stage 2, 1 on every 20 attempts =P
BOMB IT! There's absolutely no reason not to reach stage 3 almost every single time. If you fail it's because you fucked up (clipdeath etc). As long as you don't die before stage 4, it's very easy to reach 150 million points before stage 6.
All that capturing Autumn Sky can ever do is give you points, and allow you to reach stage 2 with 5.00 instead of 3.xx power, and you get a big point item before midboss Hina and another after her, so it's completely pointless.
Find the spellcards you have trouble with, and bomb them. You should know which ones to try capturing in the first three stages. Personnally, I often bombed Autumn Sky, everything Hina has except Lady Ohgane Fire (I capture non-spells though), everything Nitori has except her first boss spellcard (again capturing her non-spells), and that was enough to reach Stage 4 at 1.00 power most of the time, no deaths.
Seriously it's the last 3 stages you need to be good at for a 1cc, not the first 3, so give yourself a fair margin of error to at least reach them with a decent enough amount of lives.