Though Nelson or needto would have a def answer, Chemically I dont see a risk in running a long bridge. I love bridge and when Im not using bridge im running daa. I like alternating those two.. Unleashed may be a good one to throw in maybe run the two... 1-4 unleashed 4-8 bridge. These would give you a good "on" feeling boost free test ect ect which is what I think your going for. And because this is all natural test there isnt any apparent reason why you couldnt.