HELP!! almost a month into flowering and top leaves are browning really strange.help!

Growing 2 plants one warlock one northern lights x haze, organic soil, using roots organic bloom nuits, almost 4 weeks into flowering. The top fan leaves are turning a weird shade of purplish brown in bands down the plant in between the veins. At first I thought that they were starting to turn purple but now it just looks unhealthy. No clue what to do but its getting worse. please help!!
Also you can tell I have spider mites but im giving them axamax and its under control now
my ph is alittle high closer to seven
this is my first grow so i've never seen this before, if you have left me know whats up with them.





this is the northern lights x haze


the warlock

go easy on the food 75% of what you are using give it water 3 times before feeding it again and if you happen to still be foilier feeding stop and whats your humidity

I dont have a humidity meter so im not sure, ive had some nuit problems with this one, it really doesn't take them well so I always give it a lower solution but ill try a lower one next time. It hasn't gotten any worse today so im keepin my fingers crossed

Dude thats heat stress and the white spots are spider mites! What is your temp at?