Hit 5 Survivors With Single Use Of Feral Frenzy

I don't use Legion very often and have not been able to figure out how to do this considering their are only 4 survivors and even then getting them close enough to hit them all once it not that easy of a task. Anyone have any incite on this?
Comments
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You have to rely on the survivors being bad.
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You can hit the last survivor of the chain again with Feral Frenzy and I think it counts.
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After Frenzy attacking Survivor ABCD, attack the last Survivor again.
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You need to hit all the survivors, and then you can just stab the last target again
It's also possible to do with 3 survivors if the first target starts mending instantly
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Use best add-ons that prolong feral frenzy. When you hit 4 survivors, first one will probably finish mending, so you can hit him again. It's possible to hit 6 and 7 survivors if you lucky.
Main condition, survivors should not spread out too much. So it's matter of luck.
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Step 1: Hit all 4 survivors with Feral Frenzy
Step 2: Hit the last survivor AGAIN
Challenge done
You have to hit 5 of them while you are in Feral Frenzy, it doesn't matter if the last hit ends your frenzy
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