No way is step three going to take 50 hours to complete. I've played nowhere near that long, and I'm at 100% for the super final blows, 90% for melee and 27% for the granade ones, which I haven't even used a whole lot either. It really isn't that bad, and I for one am glad that IB stuff is finally getting enhanced perks, if the different quest steps is what it takes then I'm fine with that. Also if you read what the quest says, it states "As a team earn points" so as well as counting your own kills, it counts everyone else's too. How much easier could that actually be?