I really like Bloombastic from Atami, but ive heard some people bash it too, so go figure?
Another recipe I liked was Canna PK 13/14 with 1tbsp of bee pollen and Great White bubbled with an air pump for 24 hours.
Or if you wanna go the hippie way, make a compost of horse manure, rock phosphate and dried banana peels. Ive never done this method but a buddy of mine grew some of the tastiest herb ive ever had using that recipe, but again I havent personally tried this method yet.
My advice tho, if your not using any cal/mag or epsome salt in your mix, ADD some the day you switch to 12/12 and 1tbsp per week there after tell 3-4 weeks before harvest.