Given their good survivability comes from the double shapes (no one-hit-kill, though second shape) and that they have a good chance to heal afflictions AFAIK when they revert to normal shape, spending points on an N bless seems pointless to me. 5% healing and reduced chance of affliction can be good on expensive High-HP units with no chance of healing afflictions by themselves, not on jags IMHO.
Of course I agree with you about jags been an awesome sacred which asks for more than just 1 high bless. But with all the other options useful and nice one way or another, N seems by far the less useful, that's all
