I was playing Mass Effect

Okay so I know this may sound stupid, but I was playing a game and I learned a pretty valuable lesson.

Here's what happened:
I made my character exceptionally one sided. He was a modern day version of a mage. Casting spells, disarming enemies, that sort of thing. Then I was allowed to recruit two team mates. So I recruited a one girl who was all about engineering (hacking computers, repairing equipment), and one who was all about combat (blasting baddies, etc).

Here's what I think:
I didn't have the chance to test out this theory, but I think that the team I selected was the best team I could have had for any given scenario. I realized that by having a team of specialists my team was excellent at everything. In my head, if I would have tried to be well rounded, I would have had a team that was simply mediocre at everything.

Here's what I've read:
Tom Rath and Barry Conchie in the book Strengths Based Leadership said:

"The most effective leaders surround themselves with the right people and then maximize their team. While the best leaders are not well rounded, the best teams are." (Bold added)

So what if this is true?
If this is true, it means that I need to make sure that every team I am a part of is well rounded by having a specialist in every needed part of the organizations workings. Which brings up the question, what kind of specialist am I?

Next step: Identify what type of specialist you think you might be.