most tiring/difficult/tough stage of AM6?

[kalmah0804]

I'm on day 26 (i think) now of Stage 4 and I can say that without a doubt this one has been the hardest on me all-around, both in my emotional health/attitude/confidence/energy levels/stress levels. Stage 3 I know is supposed to be the heavy lifting sub, but honestly, I mostly just felt happy and confident throughout stages 1 2 and 3. Stage 4 has seriously been taking its toll on me. I'm curious as to how I'll react to stages 5 and 6--but hopefully they're a little bit easier on me than stage 4 has been so far.