Witch, Slumber Hex, and Cackle

Hi,

I need some advice on a recent encounter (1st time GMing a Witch in a party).

A Witch used stealth to move up to two enemies hiding next to each other: The Witch spotted them and they did not spot him.

Surprise Round: Initiatives are rolled-The Witch gets the top initiative for the party and over the monsters. The Witch cast the Slumber Hex on one of the monsters, it fails it save and it goes to sleep.

Regular Rounds Begin: The Witch goes again and cast Slumber Hex again on the other monster and Cackles. The monster fails it save. Both monsters are now sleeping, and the Witch continues to Cackle as the party moves up to the monsters and they use Coup de Grace to kill them..they both die.

Is there anything I did wrong here and/or is the use of the Slumber Hex and Cackle correct in a situation like this?

Thank you.

Cackle cannot be used to extend Slumber, so the party would have needed to CdG within Slumbers normal duration, which is 1 rd/lvl.

Cackle doesn't help with sleep, but you don't really need your party for this anyway. I found, as a witch, it was beneficial to NOT dump Strength completely and carry around a Scythe for coup de graces. I called mine the Dream Reaper.

Thanks for the input and clarification on the Hex Slumber.

Have a great week!