M2, S2 or FP2?? WJEC Maths

Looking to do Further Maths as an AS level next year with WJEC. The school are very flexible on the modules that I could take. I've done C1, C2, M1 this year and I was just wondering what modules are easier out of FP2, FP3, S1, S2, S3, M2 and M3? (I would obviously need to use M2 or S1 for my A2 Maths). If you've done even just a few of these could you please put them in order from easiest to hardest, just so I can get an idea of what to take next year. Thanks!!

I'm with edexcel not WJEC but I imagine the content is still very similar for separate courses. If I had to rank them out of the ones I've done I'd say2
M2
S1
FP2

I think M2 is of identical difficulty to M1 so I think you should use how you found it to decide whether to do further mechanics modules. I think S2 is easier than S1 however I suspect there's a rule that means you can't do S2 without S1 (although content wise I think you probably could as I didn't experience much overlap myself)