My understanding about blitz cycle, is keep them to 2 weeks. the idea is it takes like 3 weeks for your natural test to shut down from steriods, so by doing 2 week cycles, your natural test dont shut down.
Also, you need all the steriods out of your system by the end of the second week, so you need to pick quick acting steriods, and pay attention to their half lives, and make sure its out in time.
i wouldnt use anavar, just dont kick in quick enough, but dbol is allright, but maybe add test prop, or susp. the last guy i seen do one did something like this:
test eth---1000mgs---day1
test prop---150mgs eod--day 2-13
dbol---50mgs a day---days 1-13
he front loaded with test eth, and followed it with the prop and dbol. he gained 10lbs, and kept 6 or 7lbs once the water went away.
Also, it is important to take 4 weeks off between these cycle.
Now a author named Nelson Montana ssaid your test is still shut down, and thought these type of cycles were worthless. some loved them, other hated.