For a paladin, junk.
For a warrior, mebbe if you need a pseudo OT to shift to pure dps (or vice versa).
For a DK, this are hawt. The Rune Strike mechanic is a physical attack, which buffs the threat component (by negating armor, increasing damage). Note the def/dodge also fit the DK preferences instead of Ulduar's SBR/SBV gear elsewhere.
If I didn't already have tier 8.5, I'ld consider these, but I expect these to get either DE'ed or picked up by a tank needing the def/dodge/stamina upgrade.