That "heavy tea" should work well, and should get things moving again in the soil. I believe " The Rev" could have explained this part a little better, to make things more clear in his 2nd edition.
He states that:
"the recipes in the old book were a bit complex, and I've now made them much simpler, big changes include the regularity of my use of teas. These days I give my plants 2 or 3 teas max during their entire flowering period. If you are not using spikes, you will need to use them about once every 10 days or so. Another change is I've made them mellower now, and again, those complex recipes are no more. "
In the Q&A, he states:
"I will say that at different times I have hit my plants with some heavy PPM teas up around 250-300 and higher even. My norm for teas is probably around 70-90 PPM, and I don't use teas often".
To me, it sounds like he "upped" the spike recipes, to be able to get away from the time it takes to mix/brew teas. I no longer have his first edition, but I don't recall the recipes being "too complex".
He does say to mix 1gal of brew with 2gal of water, so "upping" the brew should work well.