I have also achieved highest level of Achievements for Assassin, Thief and am working on lvl 4 of Scout. The other player has highest level assassin but only 4th level Thief and 2nd lvl Scout so I've got more hits than them
Spy actions are like scouts/steals/assassinations. Defenses are also a factor, and those don't show up either. The other person may have some LC resets, too. Those wouldn't show up unless they did more than 5. Could be more propacks. Ranking is hard to determine. I wonder why it concerns you so much.
You can probably hit haunting with either the 2.5m and 7.5m pot, or maybe, if you're lucky, with 1k-2.5m pots. Either way is still a profit. Assuming you want to attack it that is.
Ilk, I can hit haunt no problem with 2.5 and 7.5m pots. His attack is higher than mine. I can sometimes get away with 2.5m>.