Wow. "Well, it's just a wish. I can't seriously wish the problems of my world on anyone if they have the good luck not to have to deal with them."

Hange doesn't want to win the current war, anyway. She wants to avert it.

"That would do as a motivator to keep someone around, though..."

The big, obvious problem here is, if your one-hit-killer despises you, as he must, given these anecdotes, and he wins every war you throw him at, isn't it only a matter of time til he turns his one-hit-kill sights on you?