This is going to be very interesting! Especially with the pre blood tests! reps!
The general advice for cycling DAA is as you've said 8 weeks on followed by 4 off. However many have run it up to 12 weeks followed by a 4 week break. It's up to yourself, but somewhere in that 8-12 week range will be spot on. What brand of DAA do you plan to run? Make sure it is sodium DAA if you can as this is regarded as the best type of DAA.
I personally would not recommend to run erase/erase pro alongside this as I've personally not noticed much from erase each time I've run it. Probably because I've never been in low single digit BF% to notice it. I had no joint issues while running it. It MAY help with your goals however. I'd wait for someone else to chime in on this. I personally felt the effects of DAA much more positive when run alone.
I would however run some Dopadex with the DAA. Good for some prolactin control and has even shown positive results for both Test and GH levels.
When do you next plan to get your bloods done? Might I suggest doing them twice, once half way through your cycle then again at the last week. Eg for a 10 week cycle, test at weeks 5 and 10.