The special soul relating to Firemaking didn't make an appearance during the event. The experience gained from the action is based on your level, according to the following formula, where X is the XP you gain and L is the level in the relevant skill. This is equal to 2/9th (about 22%) of the experience given by the standard Jack of Trades aura. The following table shows which souls were available daily. Note that on some worlds the souls available didn't change correctly.