Thank you for your response Vintage.
I’m going to try that PA placement at my next event.
I’ve narrowed down which Microphone I want to get to the Sennheiser E835 and the E845. The 835 is cardioid, the 845 is super cardioid. I like the tight pickup angles of the 845, however I’m worried about reflection off the back wall from the main PA leaking into the small pickup pattern at the back of the microphone. If anyone has any advice on this, it would be greatly appreciated. I’m going to post a link to an explanation of mic pickup patterns that has some great 3D visuals that show what I’m talking about.
http://www.shure.co.uk/support_download/educational_content/microphones-basics/microphone_polar_patterns