if i was to have my own specially designed pre-w/o, it would have these and then some:

Citrulline Malate (2g)
Beta-Alanine (3g)
Caffeine (200mg)
Creatine (various forms) - total 5g
l-arginine (similar compounds) - 2.5g
Taurine (5g)
Heavy Dose EAA (especially high dose leucine)

that and whatever else u want plus a killer taste and im a happy camper