Spots and discoloration on leaves.

Because you are using the full product line from pH perfect I would flush the soil with 2 times the pot volume in water with only 50% from the nutrients that you are using now. You've got a nutrient lockout that can be cause by wrong pH or too much nutrients. After the flush let the soil dry for 2-3 days and then you can continue watering like you are used too with the full amount of nutrients. But to prevent nutrient salt build up and wrong pH in the soil occasionally water till runoff to get rid of the excess nutrients.

ff trio has a bad ratio of nutes and i'm pretty sure barely any calcium. probably have to add that calmag as part of regular formula. with ff you end up with too little of something to too much of something over and over again as you adust to fix one thing, another pops up.

I should have mentioned that I just fed her 6 ml/gal cal/mag. I've also only used Tiger Bloom for this specific plant. I didn't end up flushing. Just a top feed til I got a little runoff. I've also stopped tiger bloom for now. So maybe, it's just going to take time?

No... it's not the start of senescence.... it's a combination of a potassium deficiency and a calcium deficiency... which will usually show up together right about this point in a grow if you haven't knocked back your nitrogen-rich nutes and increased the amount of P and K they're given (calmag should also be given about once a week). Rather than doing a flush, I would just give her plain pH'd water for a week and then start feeding her again but knocking back on the N and increasing the PK... The other thing that might be affecting her is the combination of the different nute lines... pick one and stick with it. Different nutes lines don't always mesh with each other as there are different formulations that might react adversely together.... Personally, I dislike FoxFarm very much so that's the one I'd pitch - but your call.... Once you get a handle on the deficiencies, you shouldn't see any more leaves succumbing to the discoloration - but the damaged leaves won't show any improvement... so don't expect that.. focus on the leaves that look ok now... Good luck