6. Leech
The buff description (from Siphon granted by Leech) mentions a 20% Critical Damage bonus, which is also applied. This is missing from the skill description.
The Step In Time talent is supposed to grant immunity to Snares during Siphon, but doesn't (just like the Speed Demon talent, as described in my previous post).
On a side note:
The awakening patch apparently messed something up with all kinds of Snare related effects. From skills not snaring anymore (even though they should, according to their descriptions), over Snare imminities not applying, to Bosses suddenly being immune to all Snare effects (e.g. 1st Miniboss in TT). Please have a look at that. Thanks.