Yeah, I meant Anticipation. There's no doubt Defiance is important.
You mean Anticipation?
Yeah, Anticipation stays every bit as good. The problem is that the content changes.
MC bosses are almost all physical-based, and melee crits are a major threat to a new tank there. You really need more +def.
In BWL, on the other hand, it's mostly elemental attacks that are the source of the burst damage. Crits are basically a nonfactor -- most burst deaths involve a shadow flame or similar attack, and anticipation doesn't help at all there. When learning BWL, loss of aggro is much more likely to cause wipes than crits, so there's a tendency to favor defiance over anticipation.
I see what you mean. Outside of the rare possibility of a bad crit on Broodlord, running BWL with 420-430 defense isn't some kind of major issue.