Hey Mathew,
From reviewing your posts I have the following suggestions:
1 – I would personally be increasing your validation 1 to at least 3 months
2 – I would also suggest including demo incubation of at least some form in your system (Maybe even just replace the second validation period with using a demo account instead)
3 – Although I see the sense in the stability of you sticking to JPY pairs this could lead to over correlation so it may be an idea to try adding some other pairs or mixing this up a little, just a thought
Much more importantly though is to stick to your plan at all times:
I suggest the following outline:
1 – Create your system
2 – Test you system on demo for a sufficient period of time until you are confident in it
3 – Only when you feel ready should you try a challenge or prior to that I would even suggest a small money account and limit your risk to the cost of your prop firm fee (ie fund an account with a couple of grand and try a challenge on that but limit your overall drawdown to 500 dollars for example, then check out your stats using fxblue)
Saying that however what you were doing seemed to be working well, you cant really aim for a certain profit target each month but rather to just stay in the game as you were doing, who knows if you had kept doing what you were doing then next month just may have been your month where the market gave you what you were after. Periods of drawdown and stagnation occur in the best of systems, sometimes its a matter of just following your plan. IF it is a good plan then eventually things should come good.