RE: Senario...
Which one have you practiced this shot with?
If you haven't......don't shoot.
Imagine the path your arrow is going to take through that deer. Now imagine being "off" just a little. That shot needs to be perfect to take out A lung and the heart. Miss by a little....and you're compounding your dilemma. If the deer is 10yds.....OR...you're 12'.....your margin for error is greater.
If I hadn't practiced that shot.....and I didn't KNOW which pin to use.....I wouldn't shoot.