It's been awhile since I used budblood and bigbud. I tried it twice with good results, just hard to get for me untill hydro shop just opened near me.
As I remember you used budblood the very first week into 12/12, it kind of sets the plant up to flower faster. Then bigbud finished out the grow untill the flush at the end. Now I'll have to go get some and try it again.

Hydro nutes can be used on any grow. I got my bro using it in and outside with potting soil. His stuff has never looked better but I have to mix it weak.

You will just have to find the mix for soiless. Do a search here cause I have seen alot talking about mixing nutes for your set up and watering schedual.

Oh, no superthive in flower stage. It is only for veg. It kind of messes with the plants and make them think they need to veg more insted of flowering. Lower the nitrogen in flower too. That's a sign for plants to really kick in the buds trying to make seeds for the next generation. Although you don't want seeds, you want plant to keep thinking that to make bigger buds.