Battle

defensive roles
when you play defense use the power of surprise and ambush to kill. Hide next to your flag(with a friend to make it easier ambush but that's optional) and right when the enemy grabs the flag kill him. If he is too smart he will think too hard and attempt to flee.

suprise your dead
simple if other people are having trouble and your guarding ambush with your ULTIMATE attack and that should do some damage.

I am the flag
easy get in the flag. he will be surrounded by other players chasing him.

offensive roles
offense has a battle strategy of pick a fight, supprise attack, and sometimes patience.

come one and hit me: (magic and rang pers are the best at this) hit them, attempt to kill them but avoid, dodge and get out there range as often as you can. it makes the enemy rage how he can't hit you and might rage quit or die.

no just no: get in a place to hide from enemit's and wait there for an unexpecting visitor, jump down with a pounce and take the kill.

lol: pretend your AFK(AFR or away from remote for us console users😄) and just stand there like a detonater. When your AFK players are more likely to take the kill so just get one, when he is within range jump to avoid attacks and keep hitting him and dodging. He will have a better chance of dying the fight.