First of All this is topic is only my opinion.
It seems that this game in favour with Assassins!
Survivability:
Assassin = Shadow Armor 50% Increase defense rate
Rogue = Gangster Paradise 12% HP recovery every 2 Seconds (Require Combo points)
Knockdown:
Assassin = Shadow Assault No need for combo points
Rogue = Crescent Moon Depending on your Combo points
Obtaining Combo :
Assassin = Shadow Strike 3 combo points (20secs cooldown)
Rogue = Duel Stab 2 cobo points (8secs Cooldown)
