this is a fully viable tanking enchant that deserves 15 points, what tank wouldnt want a 2k+ heal every time they drop below 35% (the crucial time when every heal counts!). it has no issues stacking to full 5 stacks, proccing on normal attacks without bleeds extremely frequently.
compared to blade ward which is a tiny amount of parry (an already garbage stat), this enchant deserves the same score.
heres a little more info about it:
Some things about this enchantment so far: it has a chance to proc no matter how much health you have as it will apply this buff for if and when you fall below 35% health. It also has a 20 second duration and with no internal cooldown (so far) it'll be very easy to keep this buff up at all times. The buff itself is in the physical school which means it cannot be dispelled.
One stack: 360 to 440 healing
Two Stacks: 720 to 880 healing
Three Stacks: 1080 to 1320 healing
Four Stacks: 1440 to 1760 healing
Five Stacks: 1800 to 2200 healing