Which is why Oblation should never have been the 82 move. It should have replaced Dark Mind completely (while being 15% mitigation instead of 10%) in order to remove a conditional cooldown for a usable one. 82 should have been an upgrade to TBN that gave it a burst heal should it break, and a small heal should it not. This would bring it in line with the other upgrades and make it so TBN can help keep you going even if it breaks quickly. Personally though, TBN really should just be 25s with no MP cost, and no free usage of Edge/Flood. Bring it in line with the other tank cooldowns.