38/2/21 semi successFollow

so i tried the 38/2/21 build in 2v2 last night, its my first time without pain suppression in arena and in 2v2 it was no big deal really. whoever doesnt know what this spec is, its power infusion in disc, and silence/mind flay in shadow. The silence and imp fear is key in 2v2, its a great added cc. but has anyone tried it in 3v3 or 5v5? i was thinking in 3s id be focused to much to make it useful, but 5s im usually 2nd target so it could possibly work. anyways thought id give it a shot to hear some resposnses. thanks!