The good thing for me in this event is that I don't have to spend any half elixirs like I usually did on the recent advents..
All I gotta do is MLB an SR assault from kyuki, get mastema once (for the jewels obviously) and her staff (and maybe an SR assault from her exchange if there's anything worth taking? Then again it never hurts to have more extra SR upgrade fodder), grab the tickets, half elixirs and maybe some grimoires if I can
And of course, do their ragnaroks to stock up on some demon cores since rahab/medusa drained those from me...