On top of this ^, the nodes seem play a significant piece too. If the team casting the LBs did not get any out nodes and the team on the receiving end has the health buff - it become significantly easier to survive the spam. This has essentially caused the changes in strategy over the past few days on Aether as previously mentioned.

Also, cometeor aside. A blm with haste, +dmg and fever can absolutely obliterate anybody in 2 haste shortened gcd's.