Complex sentence: The Cimmerian is a talented fighter, but his travels have given him vast experience in other trades, especially as a thief; he is also a talented commander, tactician and strategist, as well as a born leader.
Split into simpler sentences: The Cimmerian is a talented fighter, but his travels have given him vast experience in other trades, especially as a thief. He is also a talented commander, tactician, and strategist, as well as a born leader.