With the DoT rework into sticky and area focused, the healing numbers of "Regeneration", "Radiating Regeneration", "Vigor", and "Echoing Vigor" have been adjusted to match the sticky DoT standard. But the durations were left unchanged. They should be 20s which is the new base of sticky DoTs.
PS: "Echoing Vigor" is an odd ball here: while it does rank up to 20s duration it has a reduced per hit heal, meaning it heals in 16s what it should have healed in 10s. Still not conforming to the sticky system.
While at it reduce possible instances of HoTs you can have applied to you at the same time. Allowing at most one self cast [insert HoT name] and one [insert same HoT name] cast by a team mate.