Combustion passive

How does this passive work ? Seem to me that the only thing that give additional bonus is the Torch glyph. Magic node 10% Damage to Burning Enemies doesn’t work on it is that a bug?

the passive increase the burning damage over time in 60% multiplicative + 25% damage to burning enemies so to full use it you must apply the dot in the enemies.

read it, slowly so you can understand.
deals 60% multiplicative DOT and 25% to burning enemies.