Hello. Here's a old hack for the thrips. Take Almond, Peppermint or Lemon Balm oil (the same oils used for aroma therapy) and put 10 to 20 drops in 1 cup of water. Add some liquid dish soap about 5 to 10 drops and mix. Put some out in small trays (or plastic lids) Buy the oils where you buy the incense. They often have the flavored/scented oils in small bottles with a drip spout. Have you tried the yellow sticky traps yet.
You showed a 20% RH, are your plants living in that. Plants have a hard time breathing (transpiring) at below 35% RH. I would like to see more humidity in your tent for the plants sake. Even putting a tray of water in there would help with bringing the RH up.
Those 2 thing would really help your plants.
Chuck.