Draw life & Molten Wildbeest Gizzard interaction?

Besides the obvious insane life per second… how does the shield interact with it?

Say you’re standing next to 10-20 enemies (happens often) but not taking damage because pets are tanking. Do you gain a super shield 2-3 times stronger than normal?

What happens if you move away from enemies? Would the shield adjust to a lower value? Or the other way around - you get a normal shield far away then move in closer would the shield upgrade to a higher value after 4 seconds?

I tried doing some tests but the character sheet really doesn’t do a good job of showing whats happening.