Selection of Captain and Vice-captain can change the entire game as Captain gets 2 x points and Vice-captain 1.5 x points, so choose it wisely.
Select at-least one Raider for Captain or Vice-captain as they usually score more points in a match.
Avoid selecting Defenders as Captain. However you can select good Defenders as Vice-captain.
If both the team has best Raiders then select Attackers as the Captain and Vice-captain Players.
Never select the Captain and Vice-captain player from the same team as they chances are very less that both the players are performing well from the same team.
For player who you are not sure of how they will perform in the match , mark them as Z-Factor as their points will be reduced to half the points they score in actual match.