Most efficient melee/shielding training techniques?
Other than the offline training, what are currently the best (most efficient) training techniques for melee skills and shielding? With most efficient I understand techniques where nearly all the time spent on training is actually converted to skill points. This means:
1. making blood hits often enough
2. shield blocking most of the attempts (and having exactly 2 monsters do that)
As a nice to have: the technique shouldn't involve taking the white skull and should be safe enough to leave the character afk for a few minutes.