That's what I was saying (I was agreeing with you). Require 2 jobs to make advanced job. Job as in PLD is a job (GLD is a class). So in your case PLD/WHM (both are jobs) will become White Knight. So basically it would require 2-4 classes. GLD/CNJ to unlock PLD, CNJ/ACN to unlock WHM and PLD/WHM to unlock White Knight. But my point was if there are advanced job, then who would still play the old jobs? Everybody would be doing White Knight and not PLD or WHM depending what white knight does.