AutoPot - Think Different & Auto Amnesia

Week 9 - Day 65 - Ladies look sick and I am trying my best to get rid of any dead leaves. Given I suspected possible nutrient deficiency the last couple weeks (feeding at 550PPM / 1EC to 650PPM 1.2EC), I decided to up their nutrients to around 75% strength at 790PPM/1.6EC. I am using Jacks 3 2 1 and have seen both strains handle 1.6EC+ in other grow diaries using Coco / Perlite, so I figured this is the optimal time in flower where I would want to be at that level. Not sure if I made it worse but I am still seeing leaves dying and easily pluckable. Although, I feel the bottom half of my Seedsman Amnesia Auto and Think Different 1 have turned more of a green color. The top area is still yellow and in my Think Different 1 (right side), I am seeing curling in almost every plant (all yellow leaves and no drooping). Ironically, my Think Different 2 (middle) looks the best at a nice green color (some mag deficiency). Again not sure if this is nute burn, deficiency, fungus but I am paying these ladies are able to fatten their buds in the final weeks of flowering (I have around 2/ 3 more weeks before harvest). They are drinking through the reservoir at around 3 gallons every couple days. Any suggestions are welcome on what is going on and how to fix it. I am running this on 50/50 Coco Perlite with 4 gallon Autopot system (bottom feeding) My temps are fluctuating from 76 (night) - 84 degrees RH% is 49% (night) - 57% Problem: Not sure if this is Nutrient Lockout or Nitrogen deficiency (i.e need more nutes) or Fungus (see stems) Medium/grow method: Cloud Coco 50/50 Perlite on AutoPot - 15L pots with reservoir attached Feed and supplements used: I have been using Jacks 3 2 1 at 60%, which is roughly 653PPM/1.3EC. I was doing 100% from late veg to week 1 flower (990PPM/1.9EC) and saw some nitrogen toxicity on one plant (dark green) so I dialed back to 60% and now slowly upping to around 80%. Also have 2ML/G of Hydro guard and no other nutrients. This is all being bottom fed through reservoir. -Water source: Tap Water - 42PPM plus Jacks 321 at 60% - currently at 653PPM -Strain and age - Seedsman Amnesia Auto (left) and Dutch Passion Think Different (middle and right). About 9 weeks in (65 days). -Climate: Day Temp (78-81, 50-60% RH), Night Temp (74-76, 45-55% RH). Res Temp (69-71) - Light used: HLG 100 (4000K) and 135v2 (80% power). All lights 24/7 around 10-15inches