Intake Leak

Hey everyone. I have been fighting a vacuum leak on the bottom of my intake. It sucks oil from the lifter valley between the head and gasket on port #3. I've replaced the intake gaskets 4 times this summer to no avail.
I had the blocked decked last winter .015 so I could use an MLS gasket. After changing the gaskets twice I had the intake milled .015. It still had a vacuum leak. So I switched from the Edelbrock fiber gaskets to a Fel Pro gasket with the steel core. No improvement.
I'm stuck on what my next step should be. All the gaskets have been .060 thick and I was thinking if I used a .030 gaskets if that would lower the intake enough to get it to seal. Any kind of a hardening sealer?

Anyone have any ideas short of starting over with new parts. Thanks.