I go for a 'headless' setup. All of my macros use party1 rather than a specific char. like

/assist party1
/follow party1

Make sure loot is free for all. Do the quest and pickups and everything on the first char. Then make the second char the party leader, switch to that screen and repeat. When that's done, go for the third char and then the last char. That way it really doesn't matter which char you are on, just make it the leader and your group will work the the same way no matter what.

This also prevents any char not having money from loot, as they all get a turn at the loot cycle.