Yellow leaves and burnt tips

Nice dark buds! Your problems are occuring the most where transpiration is the highest, eg. areas exposed to the most light. Your parameters seem good, although recently your ph may have drifted a little lower from where I would want it to be. Your light is really close, I would not be surprised if this is the cause. She is likely over lit, trying to transpirate, but when CO2 becomes a limiting factor it can start damaging the leaves. I would move the light from 7-8 inches up to 14 inches. Other little notes: I would keep dialing down the "grow" component of flora trio as you are well into flower. Maybe a complete res change, make sure there is no bacteria or precipitate affecting the nutrients. Then check ph pen calibration, if you want to rule out as many factors as possible. But I am really leaning toward that strong led being too close, happy growing! 👍🌱