You'll have to judge how much choline is enough based on your subjective experience. Depending on your diet (and brain), ALCAR may be good by itself, or may need additional choline supplementation. If you get weird brain fog/fatigue/irritability, you probably need more choline. If you're getting tension headaches, it's too much.
Also, we have a nootropic section here

Questions about things like piracetam will be more likely to get responses there. Or honestly, will already have been answered there.
3) Have enough B5 (Pantothenic acid). Pantothenic acid is used in the synthesis of coenzyme A (CoA). Coenzyme A may act as an acyl group carrier to form acetyl-CoA which is in turn need to make acetyl-choline.
This may actually be detrimental. Coenzyme A is a potent inhibitor of the reaction of acetyl-CoA + Choline --ChAT--> ACh + CoA. So upping CoA, while providing additional substrate for synthesis of acetyl-CoA, will also inhibit forward motion of the reaction we want acetyl-CoA for in the first place. I've yet to see if CoA is generally a limiting factor in this double-reaction, but as it's the one part of the equation that's recycled continuously (at least in this context), I tend to doubt it. And an additional supply wouldn't get "used up" like acetyl groups or choline, so might stick around and hinder the other reaction for a comparably long time.
Otherwise, I think you're spot-on.