Heat is the problem, sorry to break it to ya, you HAVE to deal with it, or consider moving your grow outdoors.
High temps exacerbate other problems, and yes, the pale patches are likely a secondary effect of the heat.
Chlorophyll starts to break down in the mid 90s. Enzymatic processes grind to a halt. No amount of food, water, or foliars will solve the problem if the plant lacks the enzymes to assimilate nutrients.