I honestly think it would be a fantastic stack. I would run the 1-T for 6 weeks if possible, but you can still have nice benefits using it for 4 weeks with the havoc. During weeks 3 and 4 you'll see the benefits of adding the 1-T with havoc. The strength gains should be absolutely sick with that stack.
In fact, it may be my next venture as well. When do you plan on getting this together?