BW is also 2000 potency of healing on a single target.

When being hit by a flat tankbuster it’s mitigation effect is weaker than the others (though the 40%’s have largely mitigated this issue and holmgang covers the rest) but it’s better at shrugging off autos as 2000 potency is nothing to scoff at considering HS the next strongest is 1200

In single target raid situations I’d say holmgang is the most problematic tank CD followed by guardian, after that it would be great nebula then HS and BW.

In cleave situations BW is the obvious worst offender followed by guardian then roughly the same order from there

Pure healing is more problematic than mitigation but incredibly strong mitigation that allows other pure healing to catch up can also be problematic