ahh i seemed to have missed that, thanks Weatherby
Weatherby has been very instrumental in keeping plant users up to date on the workings of creepers, so the miniguide should be very useful in slotting the power. The one thing I would add is that you may be able to skimp on the recharge if you have enough global recharge to keep it perma.
On my plant/rad controller, for example, I have hasten, AM and a lot of global recharge, most of which exemps down to at least level 30, so I needed a very modest amount of recharge to have permacreepers. As such I went for 5 Posi's (all except damage/range) and another damage proc.
For another example build needing a higher amount of recharge but not 95%, I could see some frankenslotting like: Ragnarok Dmg/Rcg, 2 Nucleolus, common recharge, 2 damage procs. This requires one Ragnarok but leaves the other 5 free for the recharge bonus placed in another power. You can pretty easily hit 95% dmg and rcg in 4 slots if you also use a Ragnarok Acc/Dmg/Rcg.
Of course, if you want something cheaper you're likely to only fit in one damage proc at most.
Creepers is one of those powers (siphon life comes to mind as another) with a metric ton of slotting options, some of which will depend greatly on your overall build.
Dark Armor/Stone Melee Tank Guide [I12]
What is the best slotting?
At the moment I have a Positron Blast set in it. But I realized that if someone proc's out this power and the proc has a chance to fire for every vine created, it could be turned into a very nasty damage dealing power.
So my question is keep the positron blast set in it or proc this baby out?