Just a word of caution, I wouldn't preplan exactly what your going to feed your plants at what ppms and when your gonna do it. Instead, try to read your plants and determine if they can uptake more nutes or if they need lighter doses.
Your ratios seem fine, is that the nute schedule for the humboldt nutes?
I use the same nute line for my soil stuff but have yet to try the ginormous until later this summer. I like their 3 part, the grow, bloom ect. I also use their 1 part on the occasion which is "Oneness".
I've talked to my hydro guy and he says ginormous is the shiiit. He also said its nearly the same as Gravity IHO (in his opinion). I love gravity, and I'm willing to try ginormous. I'd suspect them to be very similar but possibly less burning with the gino.