World Pyre does not appear to be increasing in damage as it should be. When I put points into it I do not see a corresponding increase in the damage the ignite stacks are doing to the dummy. In addition, the tooltip DPS never changes.
Edit: I removed my % minion fire damage idols and there was still no noticable change in DPS. The idols totaled 80%
At the time I did not because I have multiple Golems and cannot unsummon one to just summon another to make looking at the dummy easier. I relogged and resummoned the Golem and it seems like the stacks are being modified by the idols.
For the ignite stacks I am not sure what the base damage of ignite is. It seems to be a very small range. The way I am testing this is to have the golem stand next to dummy and he uses his flame aura and I watch the ticks.
It looks like it is working but the tool tip is off. You can see the tool tip by hovering over the skill and hitting the alt key.