With 6 plants and a hot shed you're better off keeping the portable outside of your tent and inside the shed.
Cool your shed, and you will cool your tent.
Option 1; Turn the wall mount on and see how it affects your tent temps over the next 12-24hours. I am sure you will see an improvement...if that ain't enough, utilize the portable inside the shed as well and exhaust it to the outside.
Option 2; If you don't want to use the wall mount, turn on the portable inside the shed and see how it affects temps over the next 12-24hours...if that ain't enough to lower tent temps, turn on the wall mount.
Good luck