For ninja kiting/tanking they are half decent. Evasion and the damage taken -2% are pretty nice, and that's all dmg taken, not just physical. For TP build I think ill stick to my dusk gloves though.
I could totally see this in a damage reduction / tank setup for BLU. It's certainly not out of the question for a BLU to have a defending ring, especially if the BLU in question has PLD leveled as well. Also agree with darkrift that these look pretty handy for kiting.