Hi,
I use those too (but perhaps not really - depending on what npk ratio yours have, mine are very old).
You can go with just the three. If you already have all the components, use them.
Switching to "flowering" a week after showing sex and then right after stretch finished to "end of flowering". Go less than half strength of all until a week you switched to "end of flowering" and then raise - go after EC, not the values on the chart.
Your pics are fine!
If your lower leaves go yellow at a point on lacking N you might want to add your calmag. The end bloom is really low on N, so you can up that a bit at earlier times.
There is a lucas formula calculation, some go only with micro+bloom.
I loved them in dwc and hempy but in soil I always had some glitches.
Good Luck!