Not sure where you're getting the 25% all-around reduction from. To hit that, you'd need a total of 2050 resilience, which isn't even possible if you gemmed 16 res in every socket, enchanted, etc. Most people will have 10-12%
Resilience has 2 stats, one that reduces your chance to be crit, and then one that reduces the effect of DoTs and mana burn. The second number is double the first. So if you're running 10-12% crit reduction, you would be running 20-24% DoT damage reduction. I was under the impression the latter number was being converted to all around damage reduction.
"Resilience: No longer reduces the amount of damage done by damage over time spells, but instead reduces the amount of all damage done by players by the same proportion."
Though math in this game is rarely ever that simple, thats where I'm coming from.