OK you are right by start with micro 1st grow 2nd and bloom 3rd, your amounts are light that's good, they should be equal though, unless you are doing a 3v-2m-1b formula ...then I wouldn't use more than a 33% measure per g of all the additives your listing, if at all until I got them used to nutes.
truncheon meter is great,,,you shouldn't have a reading of more than 2-3 ppm/tds for RO water...I think 250-300 ppm nute levels would be best in order to acclimate plants to nute uptake, then increase weekly until you can follow the reccommended nutrient levels...imho p.s. if your ppm is too high just add ph ro water until it is where you need it