I also appreciate your work, 91 pictures is a bitch to upload. I've downloaded a shit ton of pics & always seem to fuck up something & have to start back all over. That always hurts.....it's only an hour wasted. As for the leaf problem I mainly think its because of your heat. 91F is too hot, I had the same problem & thats why I got the swamp cooler. They highest I get during the day is 82, which is a little too hot IMO. I think if you drop your temps 10 degrees, the wilting should go away.
As for the dead leaves, I dont think you have a problem. The leaves your talking about are the lowest leaves that get drenched when you water so the nutes in your water are burning them (its like concentrated foliar spray....baaad). Also they are on the lowest part of the plant so they dont get much light so the plant is getting rid of them, totally natural, I always get the same thing. I wouldn't cut them If there only partly dead, they still have valuable nutrients in them & the plant will use them up until the leaf falls off. I know I contradicted myself from my earlier post but I noticed the leaves you were cutting still had alot of green in them. I cut em when there right on the soil, or 3/4's dead.
Please don't mess with your light cycle either bro, you mess around too much & you'll turn them hermi if your not careful. Stay as consistent as possible with your lights. I'de get something to cool off the room before messing with the lights again. Maybe look into a swamp cooler, portable ac, or better ventilation.
Your plants look totally healthy, no problems IMO, just heat issues. Nice update, and good job.