Silver Mod for Purifying Chastisement-Merciless or Eradicate?

[xP1AY3R S1AY3Rx 0]

I'm completely new to the Inquisitor class and I'm going for a melee damage class similar to the one posted on this topic:

 

http://darkmatters.org/forums/index.php?showtopic=9667

 

Cthulhu has some really good ideas and hes sold me on most of his ideas. I'm just looking for a second opinion on the Merciless and Eradicate Mods on the Purifying Chastisement CA.

 

Any suggestions?

[Stangg 0]

I take merciless, in my opinion consistant damage > critical chance.