Cal-Mag works great, so you can lose the epsom salt I would think. I use a similar soil mix. Not sure if you have used the FF Cha Ching and what not, they are good but very strong go weak with the dosage. I don't know enough about your nutes to say anything good or bad.
I use:
Pro Blend Grow
Pro Blend Bloom
Liquid Karma
Hydroguard
Hydroplex Bloom enhancer
Sweet (might just use molassess, not sure yet, but it's cheaper than sweet)
Cal Mag
Clearex (pre harvest flush)
Superthrive
Both hydro and soil
soil mix is FF Light Warrior and Ocean Mix
I also do some grows with just guanos, seabird and bat, with bone meal, etc. but not too many.
I also find that with Botanicare I can almost use full dosage's in the beginning of the feed schedule, so I tend to call them gentle, and they are less salty than a lot of other nutes, don't get me wrong I still flush once a month. I've tried FF nutes but I didn't like as much, I think it was just that I was more comfy with what I already used...I burnt some plants with FF but it was my inexperience with them.