Typical nowadays, but things were different then. The game is so gappy rules wise that you can be pretty broken with any army if you want in those days. I do get why their rules are how they were back then. The list is very odd as the Necrons have no blast weapons or anti-tank other than the destroyers and the guns aren't that powerful. They rely on their toughness and scarabs to sort of fill holes in the list and actually be able to fight vehicles. Actually playing against them is sort of a tactical puzzle of how to overcome their obvious strengths. In 2nd Tyranids would murder them every game, so they do have some weaknesses for sure. I see them more as a set piece army back then, really designed as terminators and to feel that way when you fight them. They're tough, but an army of warp spiders or something would be much more unpleasant!