Core build Think about what you need. A movement option is usually a good choice since it lets you roam for farm faster and makes positioning for fights easier. However since you will get countered rather quickly it is important to hit your power spikes fast.
After you get 2 points into your bolt, youre at around 21k, think about maxing bolt or ult in that scenario, ult for good max ults, otherwise doing bolt for more damage.