The elf should be using something with an insane amount of stopping power, like a 408 cheytac, or a 460 magnum.
something that screams out of the barrel and penetrates straight through any enemy armored or otherwise.
maybe even one of those new 17 caliber bullets that they put inside of the shell from a .556
Anything to the effect of “this ring isn’t expensive enough” is the only reason you need to never marry that person.