John, I hope these papers by Matt Gerdes will be useful to answer your questions:
http://www.skydivemag.com/article/thinking-about-wingsuit-openings
and
http://www.skydivemag.com/article/wingsuit-deployments?category=skydivemag%23latest&fwd=1
I use the second mode from this paper - without flare, only relax for a couple seconds, reduce speed and than deploy PC. My full speed at this point is about 140-150 kph.