Consolidated Carrion Creepers Sets and Slotting

There's a been a lot of info scattered here and there about Creepers and how some +dmg sources seem to be passed to the spawned vines and some aren't. I've read that regular +dmg SOs and Common IO's DO get passed, but that +dmg from sets don't?

And some seem to feel that Procs are the way to go while others. Many regard Creepers as a damage power, while others don't see it as a damage source at all.

So I thought I'd start a thread with a title that would be easy to find in searches to help put together some definitive info.

So all of you who've played Plant/ for a long time and have done experimentation to determine the best slotting for Creepers, could you please share your specific lessons learned, your slotting preference and why?

Thanks in advance for any wisdom you can pass on to future Plant/ Controllers!

Here's some essentials:

WeatherbyGoode's Carrion Creepers:The Inside Scoop
Red Tomax's entry for Carrion Creepers

This power has never really been well understood by many and the fact that proc's and enhancements behaved differently in it at different times only complicates the matter. Hopefully, those links will shed some light on it for folks.