you need to be rtv'ing both sides of the gasket at the water cross over, make sure there's a decent amount below it too 'at the corner'.
but you forget that the water could be leaking at the front cover water passages.
I rtv both sides of the water passages on the intake gaskets all the time and I put big goops of rtv in the front and back where the end seals go. But what I think is that the intake isnt seating correctly because when I tighten the intake it sinks too far down or not enough because before I used the c:angry7:ork end seals.