Dylan I completely agree with you on this and want @RickRock know that this is pretty much what I'd suggest too, although there may be a slight different route if he chooses not to, or someone may not have access to a quick turn around to switching compounds.
Regarding your later post about aromasin, yes that definitely isn't the catalyst here to be causing anything.
If for any reason he can't switch around compounds to what you suggested, my suggestion is to run a 1:2 ratio on test to tren. There's a huge possibility the tren could be overdosed as well.
Typically it's best to start off that way for those who want to avoid typical tren sides but he is already in the middle and I know it'll take a little time to come down to normal.
Primo at 600 is spot on. Hell he could only realistically need 600-800 on EQ, but running a gram doesn't hurt at all for sure. But test 200, primo 600, and EQ 600-800 together will yield fantastic results without any sides.
I may not be with the majority here, but imo, EQ is highly underrated and tren is overrated.