The use of block at the top levels of blood gods is just a fad imho. I've been experimenting with ways to reduce its effectiveness and I think there are some ways to overcome it. First of all, heavy weapons get blocked a lot less than lighter ones. Second, I've toyed with armor penetration rank and it seems to be effective at reducing block rates as well. When I see a shadow or slayer with great armor penetration skills and solid gear/strategy, I think they will be a legitimate challenger for the top ranks.