Gloomfang wrote:Wall of Death isn't a shooting attack so it doesn't matter if it snap shots or not. It is a rule given to units that are charged that have template weapons.
The Deathleaper entry does not say only shooting attacks that target him have to be snapshots, it states: Enemy models can only fire Snap Shots when TARGETING Deathleaper. You are still targeting him in overwatch and therefore would not be able to use WoD as it is not a Snap Shot.