I have no experience with this but from what I have read you are wanting to do a blast and cruise. As far as I know people can blast and cruise with no PCT unless you are prone to having Estro issues. Time will tell as you stated your Dr and you are on the trial and error phase now.
You are prescribed TRT from the Dr and they will only give you the max they feel comfortable without peaking your lvl's beyond 1200. So I wouldn't expect a Dr to give you more than the cruise amount to support the blast. I suppose you could double dip and get a second Dr to prescribe you another cruise amount and bank it for weeks to support the blast, but you will pay twice what you pay now. Don't get caught from either Dr with lvl's above 1200 on a random blood work.
Another way you could get more test is to convince your current Dr to up your dose to 200 every 2 weeks and not take the full dose. Over time you could bank the extra.
I have been on cruise mode for 3 months now myself and have considered the blast option, but want to wait until I figure things out. Never done a cycle before as this is new to me.