Do NOT make the same mistake as FFXI.

[Physic]

It's more a problem with the bosses themselves, it was the same in XI. Some things were created to be more resistant to specific attacks and other things were made harder by using melee or magic. Their direction with the classes seem to be fine but if they want to create a monster that has good attacks for up-close melee they need to give the same monster an equally strong attack for the ranged/magic classes.

i also think altering the bosses would help, however, unless the ranged skill is aoe and long range donut, your still better off in general with ranged classes spread out, because the monster can still only target one player at a time. They have to get way more creative with bosses than simply AOE smashes in a small range.