superthrive will not help with heat stress save it. The roots are fine, now if you can chill the res water that would be great for the plants. You can live with 92f even 95f but just keep an eye on them closely and you will be fine. Look to the lower branches first and the ones close to the main stock.

Hermies are not the end of the world, the flowers may have seeds to deal with but at least its a bud to smoke once you get the seeds out. Sure the THC % is less due to the fact it puts more energy into producing seeds then trichomes but it's not the end of the world.