I don't see how any of those will increase FOCUS.
For increased focus and pumps I'd go with:
(preworkout)
ALCAR
Creatine mono
Betaine
Taurine
glycerine
glucuronolactone
If you wanted to spend some money I guess you could add some CM. But the ingredients I listed are usually very cheap.
Okay, to answer your question, I'd add ALCAR to the DiArgMalate. Still not worth the money in my opinion. Better to just go with plain creatine.