Hello All!

I shoot weddings, and I would like to know your opinions about a replacement for Pro800z. I plan on shooting Pro400H throughout the day, but once the sunsets and I'm going to need some faster speed films to capture that last ounce of light. Am I out of luck and am I going to need to shoot Portra 800? I'm not all too thrilled about mixing color stocks. Is 400H pushed to 800 an option? I expose my film by one stop. Shoot 400 speed film and then expose at 200,etc. Any help would be great!