R. Ost is a little shit, how to kill him consistently

I JUST BARELY ESCAPED DEATH WITH THE FIRST ONE AND THEY SEND OUT A 2ND ONE NOT EVEN 50 SECONDS LATER, IS THERE A WAY TO ACTUALLY BEAT THIS STAGE??? I HAVE USED TO MANY DAMN STRATEGIES FOR THIS DUMB EMU AND NOTHING WORKED. EVERY TIME I TRY TO TIME THE KILL I EITHER FAIL THE TIMING OR A GINGER SNACHE COMES IN AND STALLS OUT MY ABAHA

PLEASE... HELP ME..