BA is not the cause of pain, until maybe you get over 5%, BA being the cause of painful gear is a myth, and there is no reason for going over 2% BA.
If there is pain, it's shitty raw, how it was made, or sometimes just to high of a mg of hormone in such a small volume.
Using a high mg test is pointless unless you run 2.5-5 grams a week and need to cut down volume of injects. Basically it's just a high dosed multi estered test. I wouldn't waster time on it. Just like sustanon, these blends are better used for HRT because its designed to release through out a period of time. Basically what happens is if you split shots like you should, after a long period of time you have multiple esters built up and releasing at all different times and over lapping so you also end up with unstable levels which typically result in high estro and sides.
You aren't getting multiple "types" of test, it's just test and basically just is a hassle IMO. I'd much rather stick to a single ester, which is much easier to control. I do like to run TE 250 x 2 a week with test p m/w/f. No need but I like it that way.