I dont know if it is availabe as I am not as up to speed on this stuff as many are here but here are some ideas:
a multi that is really more specifically designed for people on different supps. Like a multi for PH/ PS/AAS users. maybe with some more liver protection in addition to some joint supplements. You can take 3 multi now to get a certain level of two or three things but run to high on something else which can cause problems.
A nighttime multi that has some extra zinc, mag, and b6 in it which is basically ZMA i believe so you can get better sleep and vitamin all in one
creatine with a good trasport system so you take it with water instead of juice (i hate grape juice, ususally use cranberry but dont always have some). I know cell tech has a good transport system but it has lots and lots of sugar. Not good for some diets. And yes I know there is V12 and swole and this and that, so if this is what v12 is make it cheaper.
a PH/PS that wont get on "the list" Hey it was worth a try.
a real myostatin blocker. The person who comes up with this will be a multi millioniare over night until they it is illegal the next week, b/c people die from putting on 50 lbs of muscle in 2 weeks and overload their body
I'll think of some more and like i said some of this stuff maybe stupid or maybe out already (or both). just suggestions