It looks imposing indeed, used carefully it would probably draw out every dark lance shot i could throw at it, but if it comes to it i can always zip out of range of its cannon. 2 Dreadnaughts would be much harder to dodge. Mind you, if its got a cyclone missle launcher as well i dont think id really like having to face either option much. And i dont know about the conversion beamer, i could just rush you and take away its damage, but thats with Dark Eldar. A slower opponent wouldn't have that luxury, and high str large blast weapon not a nice prospect to face at range 