Kuzmenko cut it to 4-3 at 9:34 when Martin Pospisil’s centering pass deflected in off his skate in front.
"We know they're a very highly skilled team, a lot of young guys," Calgary captain Mikael Backlund said. "They're very good at creating things, but they play pretty loose and we know when we play with our structure, you have a better chance of winning and we didn't do that."
Killorn scored on a snap shot in the slot at 13:14 for the 5-3 final.
"It's hyperbole, but it's true. You have to get better every day," Ducks coach Greg Cronin said. "That's what we've been saying. We've had a couple clunkers, and we've had some really good games we haven't won. Tonight, we played well enough to win and we won."
Mason McTavish put the Ducks ahead 1-0 at 14:03 of the first period when he redirected Zellweger's point shot past Markstrom.
"I think for [Zellweger], this was kind of a coming-out party these last two games," Killorn said. "He's playing a lot of minutes now and you can tell that he's gained a lot of confidence. He had three assists tonight, the first goal the other night (Sunday against the Vancouver Canucks). I think it's just going to keep going up for him."