I just noticed your temps and humidity levels are at a VPD( vapor pressure deficit) that is really high. That for sure increases the amount of transpiration the leaves are doing and could account for the tips being so dry.
Just saw that you are watering every three days and I think we are getting closer to the issue. Organic soil needs to be kept moist consistently for the microbes to be healthy. I water 2.5 gallon pots daily with 2 liters of water and get little if any run off. When you water does it seem like it goes right through the pot and you have runoff very quickly. If so the soil could be hydrophobic and have dry pockets in it. Try adding a drop or two of plain Dawn dishwashing soap and that will allow the soil to absorb the water better. Ideally you would use Yucca root or aloe but Dawn is at the grocery store and easier to get quickly. I’d water until runoff and then take a little break and come back and water them again slowly until you get a decent amount of runoff. That will help if there are dry pockets but I think in pots that small with temps so high it needs to be watered daily. If it’s possible you can try to get the lights on temp down to the low 80s to help it recover. I’d also try lowering the light intensity some to give them a better chance to rebound. Humidity needs to be kept below 50% ideally in flower to help prevent mold and bud rot. I’ve attached a chart for VPD , you just plug in your temp and humidity and it will give you a number. For flower you want to be around VPD of 1.2-1.6. . Using your temps and humidity I come up over 2.0 which is really off. Here’s a link to the VPD website
There are numbers for the air temp and leaf surface temp. You would need an infrared thermometer to check leaf surface temperature but around 3° F lower than air temp should put you in the ball park.
So let’s try the slow watering with a surfactant like Dawn repeated shortly after the first one, dimming the lights by about 25% if possible, if not you can raise the light about 4" or so and watering slowly every day for a couple days and watch for signs of it perking up. Let me know how that goes in a few days. Remember that the leaves that are pale/burnt won’t come back green. They are done and you need to look at the healthy leaves to see if it’s progressing or staying green.
The only thing I don’t know is what week of flower you’re in. That will help to figure out when to feed them and how much once it’s stable again. Feel free to post here or DM me if you have any questions.