I have never used Arash because why? He's the good-boy type of guy so yeah.. giving me zero reason to pay him any attention. There's more than just gameplay reason to me and when a character doesn't feel right then I have no urges to use them. And well he almost never appears in any event stories which makes me forgetting he even exists over and over again tbh.
@Raiko's Husband, almost, but: "I am not a god; rather than enslaving Humanity I want to free it from ignorance and superstition." (c) Emperor of Mankind. But, well it doesn't looks like someone really cares especially in the Imperium of Man...
Mine is at lvl 69 (funny number for funny guy), with black grail he is super duper op, sometimes i use him in wave 2 and he still manages to kill everything