ok my other thread sounds a bit cocky so i'll try and explain. the xp per level required from 20-50 isnt that different. eg from 39-40 you only need 6900 xp from 49-50 you only need 7900 xp its not a huge increase. But when everybody has advanced jobs/maxxed out subjobs, it makes things a lot easier. Also people have learnt how to play the game by then, and the range between melees is usually 1, maybe 2. Mages i've had up to 4 i think 5 levels lower and its still been good. I also try and play with japs as they usually know the game a little better, and make use of food more often. I think levelling will slow down past 50, as the xp jumps to 10k from 50-51 and 54-55 takes 15k and 55-60 all require 20k. rdm/bard becomes pretty vital if you want to get the xp speeds for their mana regen abilities. RDM gets refresh at 41, and if the whm is using regen 2 and keeping the cures low size they can really conserve mp. bards are also extremely sexy, same fighting capabilities as RDM and basically a buff class that can hit ok. A typical group setup would be pld/war/nin - 1, sometimes 2 to tank. A melee who has war subbed so they can provoke. a DRK or another damage dealer class. and 2-3 mages whm/rdm/blm works very well. At higher levels you cant do what you could do at lower levels and have a DRK instead of a pld/war/nin, they just cant tank properly. So group makeup up to about 30 isnt that important, but the further up you go, the more you'll see people fussing over it.