i dont think so coz haunting guise procs on "damage" and drain is a "transfer" mechanic... but we can be wrong since for example lifesteal is counted on "heal" mechanics and Spirit Visage works with it. For sure will test it for my guide since it can be a nice combo.

@ build.

No fear till 13? you will be VERY vurneable than... getting 1 point can be matter of life and death in mid game.

Also you are not investing in Soulstealer? Why? You are gettig raped too much without that fear :> ?

Does the haunting guise give Fiddle's drain extra healing power :D? Let's say it has 100 damage/sec when you get the guise:
-100 them
+120 you

That's cool if it works because it would it even harder for them to out dps you.