Just a suggestion, but for a taunt I'd use the "I'll see you in hell!" said right before he went looking for Luke on his Taun Taun,
"It don't seem real......how he's never gonna breathe again, all on account of pulling a trigger..."
"It's a hell of a thing, killing a man. You take away all he's got.....and all he's ever gonna have."
"Yeah, well I guess he had it coming."
"We all got it coming, kid."