Welcome to our forum.
I'm waiting on my Bullfrog A8D but I've been thinking about shock and chemicals this very day. My "theory" is this lately...Use the prepackaged "jump start" shock pack when filling the spa. Use metal gon... then use something called spa guard enhanced shock weekly (3 tablespoons per 500 gallons)...or as I read a single tablespoon after each use (heavy use). I'm new and learning so please dont take as gospel but I've read and some ppl had good results. I think this will work well with frog ease and you might not have to use regular shock after the initial shock. But anyone feel free to correct me!
The problem with using a chlorinated shock with the Frog system is that you get a CYA buildup. MPS is whats recommended and that is a non chlorine shock, which does not introduce CYA into the tub.