It's always been situational for me. Slam might interrupt that heal or nuke or gate but may be bit negligible as a stun on a melee. It's sure nice to have it though. I think in classic, slam is advantageous and less so in Kunark/Velious. Used it a lot as a Warrior/SK/Shaman, but I never ever used it as a Barbarian rogue as it greys out the Backstab timer.
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