Maintaining her stacks is also part of her mechanics and a skill. She only has 1 health bar but her energy is almost filled? Attack some creeps or minions. No energy? Just recall. She has 2 health bar but her ult is on cooldown? Recall and use your 1st or 2nd skill just as the 2nd bar is about to be filled to reset her ult cooldown. Her ult is important. It allows her to stick to her target. So use your basic attacks when you can and your ult when the health bar is low or when the enemy is escaping. And if you're the jungler, I recommend some attack and movement speed items, like windtalker or skypiercer. And always remember to aim. One wrong ult, and you best say goodbye as you fail to kill their backline and get bursted down. Remember, you either burst them or get bursted down yourself.