Horses for courses I think DJ - if you have a knack for a particular subject then it's a piece of ****. Airframes and Systems is Ok - don't be put off by the amount in there - the nasty stuff is all the fire extinguisher and life rafts kack:
"how many do you need for a double deck aircraft with 394 people, 2 cats and a gerbil on board?"
unfortunately there's no answer option that says "sufficient".
Personally I found Performance to be a bitch and Ops Procedures is just Air Law in a cunning disguise. Good luck with the rest of the swotting.