My biggest increase was from scrog. Obviously too late now but for next grow.
Other than yet I use basic 2-part nutes, veg and flower (Canna aqua, it has Silica in it).
Tried mollases. Made no difference but I'm in hydro so it's different.
Tried all the bloom booters etc, no difference.
Rooting gel and root riot cubes work for clones (I gone from 50% to 90% success)
Epsom salts if you get a mag deficiency.
Deficiency is the magic word.
Everyone is trying to 'pump' their plants up with these products and I simply don't think it's the way to go.
Personally, I think it's more about providing an optimal environment for growth (Light ,Co2, Humidity etc) then making sure there are no deficiencies. Keep a close eye, identify problems correctly and quickly and respond accordingly.
Using these methods I have always hit a regular 0.75 gpw but hope to up this soon by going over to vertical scrog.