Seriously?!? you have never heard of that? Whats your cycling experience?
Most guys on TRT run .5mg 2x a week to 1mg 2x a week when on 100mg test a week depending on what lab tests show their estrogen levels at.
You dont want to eliminate all estrogen but you want to keep it at normal levels for a man (say 20-30). Generally speaking the more aromatising AAS you take the more AI you need. On 500mg wk I would probably do 1mg eod, het labs done a few weeks in and adjust dose accordingly.
As far as you cycle goes, why on earth are you altering dose mid cycle? You bumped to 600mg from 400 to increase libido? Makes no sense, if you dont have any libido at 400mg then lack of test isnt your problem. Then to lower your dose toward the end because you think it will help recover is plain silly. 100mg/wk of test for 10 weeks is going to shut you down so 400mg or 600mg a week after 10 weeks on a cycle isnt going to make a difference in recovery.