Group exp split: Calculation

[eqravenprince]

It just all depends... it's all about what you are fighting. Do you need more safety or more dps. Assuming an ultra safe zone with plenty of mobs, adding an extra dps will almost always be beneficial for your experience bar moving faster.

[koros]

Assuming you are not spawn capped and have a capable puller, adding a 6th is almost always a good option.

First off, the healer isn't going to be doing much if any dps, the tank does minimal dps relative to dps classes.

So let's say a healer + tank does dps at a rate of 1.0. Giving a damage rate of .5 per person. If a dps does 2x the damage of a tank that goes up to 3.0 or 1.0 per person. A second dps brings that up to 5.0 or 1.25x a person.

Obviously, this is rudimentary guideline, a lot more factors must be considered. Which is why in practice 4-5 man groups are often more efficient than 6 man.

But I have to say, assuming things align, a ranger as your 6th slot is going to increase your xp gain, especially if your tank is a pally or a sk and you have someone spending most of their time pulling