Spear Shot use him to make a safe distance between you and the enemy you can also use it to trigger the passive(the passive blocks an atack)
Aegis Of Zeonia you jump to the enemy stuning him.
HeartSeeker Strike he gives multiple strike to his front this skill is very good if you use the Aegis Of Zeonia and than use HearSeeker Strike.
Grand Skyfall using this skill you can fall on any location in the map when you hit the ground every enemies around you will suffer demage.You can use this skill to gank people its very useful.And if you are capable you can do backdoors with this skill, pretty nice trick.