I assume you mean [mwcard=MW1J14]Mana Siphon[/mwcard]? Since it has a similar (if in reverse) effect, I'm not sure it adds anything new to the discussion (much like considering the mana flower would add nothing new).
If you want to think about casting 2 mana crystals instead of one, you can, although it will not help your case (since it puts you even further behind in mana and actions). I suggest that you instead focus on trying to explain what you mean in another way, without using the concept of action potential at all. Also/otherwise, as I previously suggested, it would be helpful if you stated what sort of evidence would convince you that your hypothesis is false, as otherwise it is difficult for people to know how to interact with your argument. A hypothesis that cannot be falsified is not a hypothesis - it's faith. Both these approaches would be better than analyzing a card with a similar effect.
Personally (this is not related to your point), I never cast Mana Siphon, because it seems too expensive for what it does - I prefer the cheaper options of [mwcard=MW1E30]Pacify[/mwcard], and/or [mwcard=MW1E15]Essence Drain[/mwcard], which, though situational, can often achieve the same effect for a fraction of the price