As said above, the +dmg does not apply. SS and CA both get upgraded to their from stealth versions (but still lose the +dmg bonus) - you can see this in their tooltips after using IFA and before it is consumed. The SS position from stealth legacy does indeed also work with this, as it is an effect on the inherent extra dmg mechanics of SS.
Edit: I've not parse-tested this, but I noticed a significant damage increase after switching out a legacy for this one a few weeks ago.
Last edited by Faolian; Sep 17 2015 at 02:27 PM.
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