There's not much in the way of the recipe of mycos in the myko mix so I can't say how well it will perform, but just stick to the manufacturers recommended dose when mixing b/c bennies don't fall into the growers 1/4 strength/1/2 strength rules.
The Rhino skin looks great, though I would start young plants at 1ml/gal (0.25ml/liter) and not exceed 3ml/gal (0.75ml/liter) at the other end of the grow. Keep in mind that silica products will raise your PH and when changing reservoirs, silica must be added first. Then the rest of your amendments, and finally the primaries in the remaining space, well at least that's how it is for GH nutes. I presume the rule applies to all brands, but I've been wrong many times before so....