This build is a mad man. I like it way better than "safe" cookie cutter build that makes Illidan not fun to play IMO. I have Illidan to nearly 10 so I have had a fair bit of experience with him. I just stopped playing him in the beta because I felt he had to take the survivability talents to be useful. Tier 6 I take 2nd sweep like dragon said. That talent makes this build even better. Blood for blood might be a better option with Cho'Gall though.