If you didn't get under 3 hours, I would do that first. It won't work if you can't beaten under 3 hours. This maybe a factor.
Funny, he told me it would and IT did. However, again, he walked me thru ALL MCC on legendary par score and times in CoOp. I asked him after we were done while I was gaming on H1 solo if I could use those skulls. He said yes since I already had par time and scores done. Not kidding here. It would have taken me longer to get thru H2 solo if I hadn't enabled those skulls. I think it took me a total of two days or two gaming evenings, to complete H2 solo legendary with skulls enabled. I swear on a stack of MCC games, I got the monopolized achievement after killing tatarus on the last map with Bandana, scarab and Envy ON.
All I know is this, i've been thru all of MCC on legendary at least more than once, Did H1 and H2 with my roommate just to complete Legendary CoOp and complete the maps on Legendary. Then I went again with Zombie to get par time and scores on H1 thru H4. After that was done, I had to do H2 a 3rd time to get the Monopolized achievement.
YES!!! Most definitely. How I got mine. Since you already have the par time and scores, then running H2 on Legendary with those skulls on will help you get thru a bit easier. Yes, you can use them now as you like.I already beat the game on legendary,just not in under 3 hrs.I'm actually messaging zombie stomp on xbox atm and he is saying that scarab skIull won't work towards monopolized