Since Kaladin and everyone else tried really hard to kill him, and for a really good reason I think it’s really the same as if he did
, I don’t think Dalinar has enough sympathy for him to refuse to kill him.
I guess Szeth could win... but that doesn’t fit with the Deathrattle you want to use,
And if Szeth kills him with Nightblood that doesn’t really help TOdium since Dalinar will be truly gone