If you're gonna use compost, you'll wanna start with a base soil to begin with. Most of the larger local nurseries have a good basic mix with no added nutes they private label. Start out with that, and begin building the soil to your liking. I add worm castings, compost and bio char to mine. Then I mix in my dry nutes (Guanos, Plant Tones, or whatever). After the plants are going, I top dress in or water in anything else in a Tea. Works great. Everything's really stable, no sudden onsets of problems.
FFOF has nutes in it. I'm leery of screwing around with soil that has an "unknown" amount of added nutes. Too many variables. Could end up overfeeding and have burnt girls.