They firstpicked Wisp and DS was second, so I guess they thought they just needed damage on top of that. Still, the start was wonky as hell, but kuro saved s4's ass multiple times and the brood gave up FB and then once again when RTZ got 6 for no good reason, all that pressure let Zai farm up fast mek and after that they never lost a teamfight. I think it would fall apart if they didn't get such a good start, but then again, IG seemed to be on the back foot from the beginning, if not from the draft. The BH pick I didn't understand, since his only ganking partner was the qop, brood sits in a single lane and Secret didn't even have jungler he could fuck with.