Currently, whoever is hitting the Wraith when it’s explosion animation actually ends is the person who gets the kill, regardless of who actually causes it to blow up. I believe this can also happen when a player plants a grenade in an opponents Wraith but I’m not entirely sure on that.
Proved versus player Wraiths. I shot one with a Ghost and got a grenade kill - stole it from the boarder.
Yes it is incredibly annoying getting a Spartan laser and doing all the damage on tankmaster rok then having some dude in a bush with an smg get the kill especially when he is a 150 vp boss. I also very much dislike getting my kills stolen when I was the one who dared to board the tank. This really needs to be fixed.