Originally Posted by
Synthaxx
The 2-set certainly is worth it. When i go with my threat set, with the 20% ICC buff, it's quite often i'll see 13k HotR crits, sometimes on multiple targets. Essentially, with a single move, if all of them critted, i could be hitting 39k damage, essentially 93k+ threat overall (which if continued, from just HotR alone, it'd lead to ~5.2K TPS). The helm is probably the best choice, since it's got a load more strength and a bit more stamina. And as said, 2-set.
I switched from both the warrior-lookalike helm and shoulders from ICC25 to the Shoulders and Helm T10 264 for the 2-set alone.
The 4-set, however, only really worth it for ICC25 Heroic and then only if you can get the 277 tier. For 10, or 10 Heroic, there's little reason, i've found, to use the 4-set.