What's the consensus on the value of training up to a leather breastplate versus staying at double leather? I'm having a tough time valuing the trade, especially if I am working on crit/damage padding the armor since with the double leather it will apply everywhere and with the breastplate it will only help with hits to the torso. Freeing up TPs by not having to get another 12 ranks of armor use is also pretty sweet since they are so tight for warmages generally.