I can reliably (though not 100% on haunted path) clear both of the third tiles. As Zandel said, tile 3 takes me multiple pauses for repairs, to the point where I am no-lifing it with timers to wake me up in the middle of the night to run a map every three hours to get them done. This behavior is wearing rather thin on me, and I don't know exactly how long I can keep going like this. No event should require this much and this consistent time commitment, and I'm only completing the easiest three quarters of it.

I'd much rather have events cost oil but be no-repair like PoC. Hell, I can't even use my oil except for PoC because if I use it to play normally my Lieutenant will gain multiple levels (she gained two before I caught on and stopped running invasions) and the scaling will just make it harder and harder to complete the event maps.