Well mammoth P is making the flower foods dissolve a bit.so supplementing is needed.only issue I see is the guano feed at larger or standalone larger plants.That can at higher or medium doses swing your PH.so hopefully its a stable mix.Im not familiar with that product specific,sorry.However Mephisto uses simple recipe from Bio Tabs, which is a solid regime.I have used them quite a lot.I would look at worm castings as a simple tea and maybe some of that guano feed with some Alaskan 5-1-1 maybe.cheap and effective.but PH can be an issue.and if the flowers spin longer look at getting a flower Alaskan 0-10-10 or similar.Hope that helps some.and photos in a small pot will use up lots of that soil especially with the mammoth being used early in flower.Autos should do a little better with early mammoth feeding however at week 2-3 or so at a mild dose.