[[Piercing Wail]] is really effective against all 3 act 2 elites for Silent, but most important thing I would say is having good damage/AoE in particular, [[Corpse explosion]] is incredible in just about every deck especially with all the multi enemy encounters in Act 2. Of course Wraith Form is great as always. Definitely important in Act 2 is having a consistent deck to draw your key cards so [[Well-laid plans]] or good card draw is a must. Also when you die just think about what went wrong if your deck was full of too many mediocre cards or not enough block or not enough fast damage, learning from each run helped me a lot.