Change Optimal EXP Party size from Full Parties to Light Parties

[Shiggysonson]

The problem with this is that there is only 1 healing class, and you will need one healer per party.
So with groups only made up of 4 we will run out of healers.
This is already an issue with parties of 8.

That is true. I wonder if paladin + bard would be enough to keep a party alive.