The standars counter to this I think is kodos+wywerns...I say "I think" because this strat vs orc is very rare nowadays...so I haven't played/watched it for a longtime..
Anyway I suggest u to speedscroll, eat as many bears as u can and focus fire w/ wyws on dryads..and tp out,make other units and so on..u'll have number advantage. Then adapt to what he does (more bears=more kodos and viceversa)...If he also adds some dotts, your wyws will rape them..Be carefull and micro well your wiws..keep more attention if there are also summons. I hope I helped.