The list varies acording to level. There are more BRD's kicking around the lower levels, just kind of playing around, same with alot of other jobs. From what I have seen the most needed jobs post 40 would be
RDM~Refresh at 41, nuff said, and their excellent array of debuffs
BRD~Again refresh ability (ballad), and a whole host of other nifty group buffs, as well as some good debuffs. BRD is an undersung hero at the best of times, due to mostly ignaorance, alot of people will place RDM (Refresh) over BRD, as refresh is better up to LVL 55 <?> when BRD get balladII, and after that people still tend to think RDM first out of habit.
WHM~While RDM *can* act as a main healer, its often much more plausable and convieniant to use a WHM, as they are simply better.
This list is by no means in any particular order, but I would have to say that RDM tends to take the lead a little more. Parties again, the *optimun* most efficient party set up would tend to dictate the "most needed" and as there are afew jobs absultly needed to form teh "best" party.
Alot of people prefer melee combat over mage/brd support, that and there are jsut more melee jobs to choose from, making mage/brd a little harder to come by.
SMN has a bad rap, they have useful abilities, but are not a very good contributer in the "best" setup. While blink and enthunder group buffs are nice, I would rather have a BRD or RDM in their place as I personally have had SMN parties that have much more downtime with a SMN than a BRD or RDM.
Basically party will look like this
WHM
RDM <BRD> but RDM will more often take precidence over BRD
PLD
BLM
RNG,BLM
Any other heavy DMG player, or RDM & BRD scenario only if the DD roles are filled out nicely with BLM or RNG
===EDIT===There are many variables affecting this as well, some times at any given level there is a surplus of any "needed" job,.
Edited, Wed Sep 1 17:16:41 2004 by DexxH