I'm surprised about o.p. not getting good results from Flora Nova, i just switched to Flora Nova and am KILLING it. One of my healthiest easiest grows to date. I also use Armor Si, CaliMagic, Floralicious Plus & liquid KoolBloom in mid to late flower.
My 2 cents on the additives. .. i use Tupur coco, & if I even think about stopping using cal-mag, my plants' leaves start showing "tiger striping". Armor Si I can say i have observed it help result in sturdier branches on a clone I ran twice with & without it. Floralicious I swear results in "smellier" plants, I just started using it seed-to-chop & not just in flower, and my veg plants are way more aromatic than before. KoolBloom doesn't "double" yields but I feel like it does help make heavier & denser flowers by an observable margin.