question about shaman's slam

[Duik]

Relative effectiveness could be down to user skill. Now im not trying to insult anyone but someone who doesnt just mash bash and tries to time it may have more *luck* interrupting.

Same as a stun class specifically trying to interupt a casting npc waiting for cast animation/particle effects before casting fast stun.
Again not trying to derail/insult anyone. But it could explain contradictory experiences.

Additionally interupting a CH is more important than interupting an npc self buffing or casting dispel on tank.