Originally Posted by
Flocci
1. The crystals from the event are not included, so you can do it if you start with only 9. Maxing her is really affordable for a maxed out top tier black unit, if you consider what 9 crystals would usually give you on the gacha. I would still recommend having a bit of a safety net though, in case you don't flawlessly clear everything.
2. I think awakening didn't exist back then, so they should "only" be normal CCs, but the map does look quite intimidating. The lowest I've seen was someone who did it with, like, half the Team CC'd, and his strategy relied heavily on an event mage we skipped on our version, so I'm not sure how well it translates for us. The good thing is that the mission before that looks quite doable and gives almost the same amount of Serum per stam. I don't know how strong your team is, but I wouldn't be surprised if 1 week of preparation would be enough for anyone to become strong enough to clear that map.
You will need a few more crystals that way, but I expect it to be something like.... +2-ish added to the average, but that's just a gut feeling without doing the actual calculation.
On a side note, that map also has a decent chance of dropping Daniela (like, 15% if I remember the numbers from the wiki correctly), so if you need some silver archers for CCing a certain trading post unit, it might be worth doing the 2nd to last map even if you can actually clear the last one with no problems.