First Cycle of Test, Have Some Questions

Hi this is my first cycle of Test E. For this cycle my goal is to put on around 10-15lbs of lean mass, anything extra would be a benefit.
My current stats: 5’9, 182 lbs 15% bf

The items I have for this cycle:
2 bottles Test E 250
1 bottle of HCG 5000 IU
Arimidex
Nolvadex
Clomid

I started my first pin Friday night. I plan on doing two injections twice per week for a 10 week cycle maybe extend it slightly longer.
I have a few questions regarding my cycle since I have already started:

I have not started my HCG or my Arimidex since I have done my first injection. I’ve seen a lot of different responses from doing my research. I would like to know what week should I start my arimidex as of right now there is no gyno issues. I’ve heard the best scenario would be to wait until week 4 to see if any gyno symptoms flare up and I just want to be sure if this is the correct approach waiting until week 4 or I could start my arimidex tommorow at 0.25mg every 3 days.

For the HCG, I haven’t started it yet and planned to possibly not use it for this cycle. However, if I noticed bad shrinkage near the end of this cycle, then I would do a blast last 10 days of cycle and 4 days before PCT starts. I have the HCG on hand, I’d like to know if this would be an OK approach or should I start it now at 250 IU 2x/per week. Like I said, the original plan was maybe to not use it unless I noticed bad shrinkage then would do a blast.

On a side note, I was thinking of maybe pinning once every 4 days. So I would do 1CC of 250ml of Test E every 4 days. I would like to know if that would be an ok approach to make the cycle last slightly longer since it takes a decent time to kick in anyway. Or if I should just do two injections every 3.5 days.

My PCT will consist of:
Clomid: 50/50/50/25
Nolvadex: 30/20/20/20
DAA (natural test booster)

I hope you guys could give me some good advice on the questions I asked regarding my cycle. Once I have those questions answered I will put a cycle log up! Thank you for taking the time to read!

So should I start the HCG on my second injection since I’ve already done the first injection without it? I have read that it can increase your estrogen levels even more with HCG and AI is a must with it. So if I started the HCG my second injection you think I would still be fine waiting until week 3 or 4 to start the arimidex? I really appreciate your advice, thank you.

Any other advice appreciated. I was actually thinking of saving the HCG towards the end. I just want to hear any experienced users input on that if I should do a blast with HCG towards the end at last 10 days or start it now?