stopcast - XoilacTV

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You're not in any particular rush to use the hotstreak proc, so therefore it's not worth using a /stopcast macro. The most important thing you should be aiming for as a DPS to improve your damage output is uptime: You always want to be casting something 100% of the time, or on the global cooldown.

Short answer: It depends. Long answer: If you're simply trying to stop casting of a spell with no following action, then moving is just fine and is preferred so you don't waste a keybinding on doing essentially the same thing.

I have been seeing many macro commands across the internet saying that this macro is useful as it will (for example) apply execute OR slam and if execute is not yet useable the macro will use slam. The macro is like this. / cast Execute. / stopcasting. / cast Slam.