i wouldnt spray for any deficiencies that dont exist yet. You may start agitating the plant and make it start showing nutrient lockouts that look identical to deficiencies. Ive seen too many people use calmag when it was not needed that simply forced the plant to lock out calcium or magnesium. As the plant does this it will yellow up causing the same person to simply keep adding more calmag until he finds himself harvesting plants that do not have any fan leaves left on them from being burnt off. Some think this is normal and simply say that their plants just eat a lot of calmag. Calmag deficiencies in my experience are not as common as most would have you believe. If you are using a soil less mix you need hydro nutrients being that they carry plenty of calmag. Soil nutrients hold back on the calmag because most soils will have lime or the equivalent. In hydro, most suffer a magnesium deficiency due to most hydro growers maintaining low constant ph of around 5.2-5.8. Instead of letting the ph swing up to 6.2 and readjusting back down, they tend to start foliar feeding calmag, which will remedy the MAG issue but by doing this they may overload on Cal. Nutrient absorption is best controlled by letting the PH swing a bit in either medium to allow the most even absorption rate possible all across the nutrient uptake scale. If you dont let the ph swing certain nutrients will not be used by the plant efficiently causing an overabundance of the nutrients in your medium. Your plants definitely show heat and humidity stress. It is hard to work with high temps. The only way to really do this is in an enclosed room using CO2 and regulating humidity and temps.. In a non enclosed room with a lot of ventilation your plants have problems retaining moisture which is the taco effect you see. Its simply trying to hold every bit of moisture possible on the leaf surface. It rolls up to trap the humidity. Also the pants seem hot (nute overload). With real high temps the plant will attempt to suck up more water which means more nutrients working through the plant at any given time