Simple
Hire the most competent pilots you can with real IFR experience, and don't listen to these guys when it comes to 'hire attitude, train for aptitude'' no one wants to a tranee learning to fly with a 100 people in back.
If you pay, then the right people will show up, if you dont then this conversation is moot, you will get the people that just want to fly and tell you want you want to hear to get the job.
Personaly, I would start with guys with PIC IFR experience, college degrees, and turbine/jet time. The more heavy nasty weather time the better.