Love the brainstorming! What it can be noticed at first glance is that VoB is not sinergic with flash of insight and snapcaster mage in a lesser extent.
TFK sounds good but i'm not pretty sure if i want to "loose" 2 cards to increase in 3 my yard for VoB before going off. 3 wishes comes to mind in this point.
I understand that 3w is great as 4th/5th meditate during we are going off but it's not so good for shaping your hand pre combo. TKF does i guess and during the combo you can discard useless lands...
Edit: Other thoughts came to my mind. My testing showed that VoB gives us 3 cards during combo, 80% of times, it's literaly an
Ancestrl Recall while you go off. Do you think that TFK significally helps us to make VoB clearly different from Opt?