Nope. First, the job main stat isn't always the one that they raise due to certain traits and skills (Cleric stance on SCH has a good role). Second, get a pre-made group together. Why do people complain about PUGs? They are random; you are trying to control random. There is a simple solution to your problems with having random people join your groups... make a not-so-random group. The sheer amount of people that complain about getting random people in a random queuing system is ridiculous.