There were many people asking for a fix to stop the different allegiances from hurting themselves. People not in the same party as wizards would get hurt by area spells even if they were of the same allegiance, for example.
Is it possible to increase party size for ToH to include all the people of your allegiance? I (as a priest main) would love this, as it allows priests to actually be useful to the whole party with their party buffs as well as allows them to see the HP of their whole team. This would allow other party buffs to affect everyone as well.
I think this would make the mass battles more interesting and strategical rather than just rushing out and having at it. It would help show what each side is really capable of as a team rather than what individuals are capable of.