Okay, i have big bud, pk 13/14 + canna coco a+b, i'm thinking of replacing my PK13/14 with overdrive, but the PK ratio is massively different, can advanced nutrients be used with canna coco a+b base nutrients?

Also, I'm really confused with the advanced nutrients base nutrients, i'm guessing i would need sensi grow a+b, as well as sensi bloom a + b, and a week after flip, change to the bloom base nutrients?

My problem with that, is right now, as well as buying other stuff, i don't want to be over buying too much, and much less under buying.

I am unsure of the dilution ratio for AN base nutes, so how much do you think i would need for say, 4 plants, given around 1-2L a day each, with roughly 8 week veg + 8 week flower?, so i know how much to buy really, thanks.