The Chosen Champions are ferocious front line warriors of the Chaos army. Tzeentch, the Raven God, has bestowed great powers to the Chosen, in the form of Dark Gifts. These powers of Chaos strengthen their abilities and the abilities of those in their group.
The main role of the Chosen in groups is to tank and buff the party with auras. Being able to wear heavy armor and wield shields, the Chosen can take beating while still dishing out a large amount of damage. Their auras help reduce damage even more, and can increase dps or do some light healing, making them an excellent class for soloing. But in groups is where their buffs really come into play. Being able to increase dps for the entire group and increase resists means less damage to the party and less down time.
In realms versus realm play, the Chosen is a difficult opponent to beat. Their ability to take a ton of damage and deal out damage, combined with the effects of their auras, means serious trouble for anyone caught on the wrong side of the battlefield. Having a healer assigned to them in RvR makes them an almost unstoppable force. The main weakness for the Chosen is ranged attacks. Without a ranged attack of their own, in order for them to deal out the massive amount of damage they are capable of doing, they must close in on ranged attackers before they are allowed to do to much damage.
Whether in PvE or RvR, the Chosen are formidable warriors that are difficult to bring down. Learning to play your Chosen character properly is vital if you expect to lead your party into battle.