I see little wrong with your plant. Unless you see leaf symptoms developing I would keep on with what you have been doing, although adding the pH meter will not hurt. However, I have no experience with your soil mix or nutes, so take my opinion with a grain or two of salt.
I chased drooping on my recent Mephisto CDLCx3BOG plant, and in retrospect, it was just a genetic thing and had nothing to do with my watering. At least that is what I concluded by the end of the grow. Nothing I did had any impact on the leaf behaviour, and the plant produced just fine in spite of the droopy leaves.
Good luck with it.