I had Blade Ward on my Last Laugh and thought it sucked. The proc chance was low, and the number of times I actually parried and got some damage off the proc was few. I've got Blood Draining on my Shiver now, and it procs all the time so getting five stacks does not take long at all. I wish it healed a bit more (like Runic Healing Potion levels), but right now it's like getting a free Super Healing Potion whenever you get to 35% health, which isn't too bad. For pure survival, it's the enchant I'd go with, but Accuracy definitely has it's benefits as well.