Energetic Stabbing is worth ~45 relic ilvl
Quiet Knife is worth ~6 relic ilvl
So a 860 BS relic == 866 ilvl ; whereas a 845 ES == 890 ilvl.
In short : not worth it. Maybe if you have the legendary boots and already 1 (or 2) ES relic because you'd overcap energy, but even then I'm not sure it'd pull ahead...