Dan,
You are a thinker & that is good; thinking out the issue & trying to make an informed decision.
A custom grind is a good idea, but sometimes with FT cams, the available cores limit LSA to 107/108.
In my opinion, you are over-thinking IVC. What happens just before IVC? The valve is closing & is open just a few thousandths. The way more hp is made is to hold the intake valve open longer & with more lift; hence roller cams with 0.700"+ lift.
I would NOT use a dual pattern cam if low/midrange tq is the goal. Use a single pattern cam with more intake duration. Such as the Isky 264 Mega which is on 108 LSA.