[Murphie]

This brings me to my question, shouldn't tanks make sure they share aggro when a PLD is not present to maintain full aggro? such as "WAR 1 provoke /wait 15, war 2 provoke /wait 15, war 1 can provoke again, etc" rather than "monster charging mages, 3 war provoke at same time, screwed for 30 seconds".

Everyone else has covered things pretty well, and you seem to have the right attidude anyway, but I wanted to address this.^^

Honestly, while Paladin is a really wonderful tank, for the part of the game you're at currently (below 30ish), a single Warrior can actually main tank very well with little to no assistance with the provoking duties. As long as he has a MNK sub and uses a weapon that is fully leveled (ideally an axe or great axe) he should hold hate very well. That leaves the other WAR or /WAR in the group to focus on DD, and only worry about provoking when the main tank loses hate for whatever reason. This will help out your healers in that they won't be having to heal everyone in the party as the hate bounces all over the place. A single tank is always a lot easier on a healer.

Now, later on you will encounter instances of Warriors (or other melee even later on) subbing Ninja, and trading hate amongst themselves that way. This is because they only hold hate long enough for the mob to tear through the shadows that they cast with their Ninja subjob, and then someone else grabs hate to do the same thing. In situations like that, trading mob hate makes perfect sense.