I have the same leak.

My hope is valley gasket has failed between the cylinder head and the lower intake manifold. There is an opening for coolant in the rear of the cylinder head that is blocked off with the lower intake manifold.

But if that is where the leak is the debate is to do the head gaskets or not since so much of the engine has been removed to replace the valley gasket.

 

I've noticed temps rise and heavier leaking when I run the AC. Not sure if that's related or not.

 

Run your coolant tank cap one full turn loose from full tight, it won't build pressure and will leak less. Temps rise because AC increases heat in the system,

 

just drive in your speedo and run with full heat on...