What skills are needed to sustain a research group? As a young academic, I am struggling to set up a research group that produces papers or proposals on a regular and sustainable basis. I had my share of PhD students, but nothing structured in a proper group or centre. I am also aware that when an academic starts collaborating with others, s/he sooner or later realises that several skills are needed to achieve a quality submission, and that not everyone can excel in all the needed skills. 

What type of skills are needed in a cohesive academic group or research centre?
I try to only work with people who are capable of excelling in all the skills needed to perform and write up high-quality research.  

That's not to say that some of them (particularly students) won't need training in those skills in order to excel, of course.  But I definitely don't believe in having 1 guy who only collects data, 1 who only analyzes data, and 1 who only writes (or some such scheme).  If you pursue such a scheme, you may be crippling people.  They'll likely have a hard time in their next job, when nobody holds their hand through the other parts.