(Request) If something dies midcast, can my cast still go off?

[odie]

"Let tank and melee handle the near-dead stuff. Bring misery to those full of life." Basically, as a caster, you should always be focusing your attention on the one with the most health.

Lol...sometimes it feels like everyone follows that rule. Tank, sometimes undergeared or not properly using cooldowns on a big pull, and I am sitting there healing my ass off staring at that mob that's had 5hp for almost a whole minute. Drives me crazy when people won't attempt to at least finish it off with an aoe or something. Even if its hp is low, that's damage I'm still healing. If swiftcast is up i'll usually just swift holy or something to end it. But seems way too often that targets are left alive that shouldn't be anymore.