everyone has their own exam order.
Motivation is a big thing here too dont forget. What I did was piled the books up on my desk, then started knocking them off one at a time and watching the pile of books getting smaller. That way I built up a bit of momentum to get finished.
So, I did:
Air Law
Human Performance
Radiotelephony
Did those 3 to shall we say get the smaller of the 3 subjects out of the way first, then after that:
agk
performance
met
then I left Nav till the end so I could learn that hand in hand with the practical side in the aeroplane,
all the best, either way you choose am sure it'll work for u buddy!