Ignore Resist vs. Weaken & Effective Guide by Mid (as of Patch 2.5)

[phaolo]

Here I asked the mods\devs some info about this topic and (with some difficulty) I understood this:

IGNORE Resist or Weaken?

Thank you for replying again. So, now I finally understand that, against any kind of monster (even specials): the combo effective + weaken\ignore resist is good. Effective always provides a 25% dmg boost, whatever is the resistance. W \ IR increase dmg on their own. Against players, instead: both effective and ignore resist don’t work (=wasted affixes on gear) Weaken should work normally.

Btw, I recall that they said somewhere that Weaken has a 50% chance to trigger, but I’m not sure…