Ah, yes, there is, of course, the slight problem known as a big squad of absurdly cheap Lootas. lots of shots, decent range and S7, in other words like being shot with autocannons and plasma. There are 2 things that munch right through Stormravens in an Ork list. Lootas are one, a Nob with a powerklaw after you get Stunned by a rokkit is the other.