Best rune/thingy for Shadowsting?

[cookie]

Hey guys, I play a level 12 warden and recently obtained a Shadowsting.

The stats are
30-46 damage
+50% piercing
Slow
16 energy leech p/second
15% life leech resist
+11 dex
+12 OA

Quality: Blue

Please suggest REASONABLE compounds to finish off this weapon please :happy:

[greatcthulhu]

You can't upgade an Epic weapon. Sorry. But ShadowSting is a good weapon.

[cookie]

I meant like a relic or something, but I can't compound anything onto it? :(

EDIT: Well damn. Okay. Moderator can lock, or I'll delete. Thanks for your help!

[Lillis]

There's a relics-in-all mod, but I'm not sure if it's been updated for IT.

[Infares]

Pretty sure Defiler can do it now.

[tim]

Relics and charms can only be added to grey, white, yellow and green items. Blue and Purple items cannot be upgraded in this fashion.