LSD Auto LED grow

Week 3 is behind us. All 3 plants have recovered from the early over-watering issues but i'm still seeing minor deficiency issues that I'm hoping will improve as i increase the nutrient schedule. I'm really hoping week 4 brings some substantial growth, as i doubt i'll get a 5th week of veg before pre-flower pistils start showing up. You can start seeing the difference between the 3 different training techniques I'm using. LSD#1 - Aggressive LST LSD#2 - Topping & LST LSD#3 - No training Day 22: - no water - continued LST on plant #1 Day 23: - no water - signs of deficiency... Possibly Cal/Mag? Day 24: - signs of deficiency worsening. - new growth appears "spindly" (thin, weak) - watered with 50% strength of just Remo Nutrients' "Micro" & .5 tsp Plant Prod's "MJ Spike (CaMg)" per gallon. - water pH'd to 6.5 Day 25: - no water - signs of deficiency worsening. - new growth is very spindly - leaf discoloration worsening I could use some advice here growers. Am i looking at a Cal-Mag deficiency? Manganese? ...Zinc?? Could there be some lockout issues happening here due to over-fertilization of, say, Nitrogen?? Feel like i'm stabbing in the dark in all directions here. Day 26: - Flushed plants #1 & #3 with 6.4pH dechlorinated tap water. - Run-off pH was 6.5 and was relatively clean looking. - Assuming Nitrogen toxicity, combined with minor light burn. - Moved 6400K Sunblaster LED strips up to match height of QB96's at 24" from canopy. - LUX measurements at canopy range from 16K along perimeter, to 28K. Day 27: - Plants #1 & #3 looking slightly better - Flushed #2 with pH 6.3 water Day 28: - Hoping things are improving! - No water - RH: 64% - Temp: 66-75F - I think it's safe to say, the girls are about to start week 1 of flower!