My analysis of this mission:

This new mission is fairly easy if you're a high level. It's just time consuming. The mission itself takes about 25 minutes to complete (solo). The monsters have very low HP (about 1/4? of normal multi-mode HP). You get to go back after stage 2 and 4 to restock. Don't be stingy with your Ex traps in stages 1-4, you'll be able to get more.

You are guaranteed to fight Anastasis for the boss. Anastasis does NOT have reduced HP. However, it is Anastasis, and all of Anastasis's moves are incredibly easy to dodge (the danmaku barrage is probably the hardest to avoid 100% of the time).

The best race for this mission is DEFINITELY Newman. No arguing! I don't feel like explaining either. 2nd best is Human, 3rd best is Cast, and naturally, beasts are the worst yet again.

I've done it 3 times so far, and instead of refarming the tickets, I've abandoned each time at the end due to the lack of anything worth keeping. I did get a Milla but it's completely useless.