Difficulty
Twilight Assault is an offensive ability that doesn't deal damage itself, but grants Shen bonus magic damage on his next 3 basic attacks within 8 seconds. If the ability hits an enemy champion, the ability grants even more bonus magic damage and also grants 50% bonus attack speed. Enemies hit are also slowed when moving away from Shen.
Difficulty
Wukong can be a decent tank due to his Stone Skin passive as well as being able to dodge abilities with Decoy Decoy. Wukong can be a very effective AoE assassin, with Crushing Blow. Nimbus Strike and deals very high damage with a knock-up with Cyclone, as well as being able to covertly dive in and slay any vital carries on the enemy team. Wukong can also be used as the usual bruiser/fighter style, engaging and disengaging with solid damage and solid survivability.
Difficulty
In lane, Varus' unique combination of abilities gives him the ability to apply constant pressure to his opponent. Piercing Arrow Piercing Arrow allows him to both farm safely and damage enemy champions without fear of reprisal. Meanwhile, the area of effect healing debuff from Hail of Arrows Hail of Arrows complicates a support champion's efforts to out-heal the attrition damage. When the time comes to move in for the kill, Living Vengeance Living Vengeance keeps Varus' Attack Speed high while he's last hitting, enabling him to quickly stack up Blighted Quiver Contamination charges from Blighted Quiver Blighted Quiver in preparation for a finishing blow.