um.... "Reply hazy. Ask again later."
I only have one slot in it since I just got the power. 
Paragon City Search And Rescue
The Mentor Project
This is what I'm aiming for. All I need is a Hect, and I'll be complete. So, after i16 comes out I guess.
Siphon Life -- HO:Nucle(A), HO:Nucle(36), Numna-Heal/Rchg(36), HO:Golgi(36), Dct'dW-Heal/Rchg(37), Hectmb-Dmg/Rchg(42)
66% Acc, 94% Dmg, 33% End Red, 83% Heal, 83% Rech.
@Rylas
Kill 'em all. Let XP sort 'em out.
Siphon Life is the posterchild for frankenslotting, since there is no aspect of the power you don't want to slot for. Except maybe tohit debuff, but slotting for that would be crazy.
They ALL float down here. When you're down here with us, you'll float too!
@Starflier
At the moment I'm running 4 TotN and 2 Theft of Essence to "max out healing" which is honestly a waste of resources, especially considering SL does quite a bit of dmg when it's slotted.
So what's the best everyone else has come up with? Set bonuses aren't a major concern, so don't let that hold you back.