If it helps we do it this way:
Human Performance
POF
AGK
Instruments
Law
Ops
Radio nav
Met
Comms
Nav gen
Flight Planning
M & B
Performance
The grouping allows for the most crossover of questions between subjects, and building up of knowledge as you go along. Flight planning requires knowledge of Met and law beforehand (it says so in the LOs)
Richard is right is saying that a lot of Met underpins everything else, but HPL includes a little as well and it's probably the one subject that most people know something abotu anyway, so it's an easy start.
Good Luck
Phil