You might look into Bud Factor X.
But before going for additives, maybe reconsider your base nutes. How about using pH Perfect Connoisseur Grow and Bloom? It's the top of the line, claimed to be the best, has a good rep, it works for me and others, etc. And competing as a mainstream base nutrient line and by AN standards, it's cheap -- could be a high yield upgrade. At worst, it'd be comparable to Grow-Micro-Bloom.