The only reason why this bcnm is terrible idea is when most everyone is 99, it would be a bit of a challenge for new or returning players to get help. Most of them will have to level at least one of the xyz jobs (summoner, beast, monk, black mage, red mage, scholar - at the minimum 1 or 2 of these jobs), farm the tails, and then shout for help. Without a LS who is willing to help you - you will face with the daunting challenge to get 5 other random people to help which can take between 30 mnts or longer. There is no other options for returning players or new players that want to do this say, 6 months down the road, either find 5 random people, or find a good LS - end of story - and also know your jobs