WHOOPS.
Well I feel like a dingus.
If anything, of the event types I've enjoyed, only the unit farming comes to mind. Mostly because past star events when I first started were out of my reach and the big flop during Karma's event that led me to only getting a minimum costing plat Karma. Sure I'm capable of doing them now, but that is only after building up the forces I have, as well as the units obtained from unit farming (Maribel you miracle worker).