i don't see those ratios working out.. no matter waht going to be light on potassium (k)... unless your substrate is amended with extra K and some sort of slow release if it can last 3-4 months.
8-8-15 (ratio, not concentration for this context) is the weighted average you want to start near. concentration at 1.3-1.5 including the ca/mg/s components too. This would be for a feed you give every single irrigation in a soilless context.
for soil, you need some translation to make that work well. It depends on what came in the soil to start, and the ratio/concentration of those included nutes... in the end it has to balance out over time to something near what soilless/hydro context uses. Plant metabolism dictates. Amendments in soil will need to be supplemented initially, but eventually you'll be providing nearly 100% of nutes used by plant in soil after a month or 2 in a pot.. tranplanting resets that clock, of course.