g is good on an e comedown. i dont recommend doing it with ketamine just because u wouldnt really feel anything from the g
I wouldnt mix the two together as they are both CNS depressants and they certainly increase the effects of each other! Every time i have done to 2 together i have either ended up in a K hole or passing out from the G!
GHB is best i have found with stimulants - i use ephedrine - yes it does lessen the effects of the G but that is preferable to passing out! Ive found the best way to do the two together is to have sufficient G to feel unsteady on your feet then drop the ephedrine & you come up like hell! Lovely!