The tooltip for this power states that after a successful critical hit, the next melee ability will hit 30% harder. Sounds like a great deal. What it doesn't say is that it only works on shaman powers.
This is a deep power on the tree, it's hard to get without specing heavy shaman, and it gives a damage boost roughly equal to 30% of your critical hit chance, and that only on melee abilities, which even on a well geared character doesn't get THAT high.
While I would settle for a fix in the tooltip, I would much rather that it worked for ALL melee abilities. While anyone playing a pure shaman gets the full benefit of this ability, those who attempt to combine shaman with other souls will be shortchanged.
The entire point of Rift's multiple soul system is to create your own unique combination of souls, if only some combinations per calling work, it severely limits the game.