Use Gollum's "fart cloud" ability to make a quick and cowardly escape.
So Gollum plays like a simplified Slark, and Gandalf is somewhat analogous to Warlock, though with far less utility? Gotta say I'm bummed with where the AoS/A-RTS genre seems to be going. Building skills around shallow, forced synergies is just about the worst thing you could do when building a hero!
I didn't even realize that Monolith was still around in some form. I miss the days of No One Lives Forever 1 & 2.