bloody had enough dutch pro i'm sick of burning my girls

Hello guys, i thought maybe someone could help me out here, i have been using the following beneficial's.
bat guano
bio humus-liquid worm humus soil extract
fish blood and bone
organic black strap molasses
canna pk 13/14
epsom salts
jacks magic potting mix
dutch pro a+b bloom
i add the guano and fish bloodnbone to my potting mix along with a 100g of epsom salts per 50liters of potting mix.
during veg every other irrigation i give bio humus and epsom salts
a week before bloom i start to give the dutch pro stuff at half the recommended rate and ramp up slowly. when i get into late week 5 out of nowhere i seem to get nute burn on anything even vaguely sativa.
would i get away with dropping the dutch pro altogether and give just the pk boost at the appropriate time?
is there another way i can up the pk at week 5 without this happening.
i get reasonable yields averaging 1-1.5 oz each girl,
i am running two 600w hid's in a two meter tent.
currently growing-afghan x domina- delicious candy-dj short blueberry- jack el fruitero- chronic thunder-
and pineapple skunk.
i just wonder how much better it could be if i didn't keep f*cking it up lol

drop everything but the pro a and b. feed at 1/4 strength every time you water, forget about high P/K, that is an old and bad way of growing.I bet you see amazing results.
Grew this with just foliage pro

agree with the above poster, you're feeding with two products that do basically the same thing. you only need one of them. that is likely the cause of your burn.

also why do you put the epsom in the soil, AND water in a diluted mix of them? seems like far too much application. sometimes less is more. also, absorption of Mg through the leaves is highly effective, and rather than watering them in so often, you could be applying foliar instead.

OR you could avoid all of this by making a complete soil with mineral and organic amendments and your grow would only require plain old water. No ph'ing, no mixing this and that, no making the plant dependent on you. the plant would literally grow itself and you could just watch the magic happen. i mean, you're already adding things to your soil... if you add a few more ingredients... you're basically getting close to a water only mix. Just something to chew on for you.

Good luck, hope you find a solution!