Will watering more frequently offset my low humidy

I wouldn't worry if the relative humidity is not text book perfect, your plants will be fine in whatever level of "low" humidity you have and the low humidity will be more beneficial when they are flowering, as high humidity at flowering is great for mould and fungus growth. If everything is working "a treat" at the moment, don't fix anything. Trying to answer a question that doesn't need an answer, may just complicate matters with no real benefit. I would suggest, if everything is working well, don't change a thing. Hope this helps,......... Organoman.