The highest i've had my s7s is 70 temp, and when that happens I lower frequency down to 600-650 and leave the fan at 100% and it brings it down to 64-67. My miners stay around 60-67 all day, but when it sometimes reaches high 60's i will open the door that the miners are in and it usually drops it down to 62-64. I've had the miners for about 3 weeks now and no problems.

edit: saw your second picture, make sure to add a back up pool just in case the primary pool server goes down.