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.
A build working around sniping with Vexing Bolt
for high burst damage. Your Assistant and the Carpet
can make you incredibly difficult to catch. The usage
of your abilities should be at a decent level for this.
I recommend setting both the Assistant and Bunny
Hex to confirm cast if you are struggeling. Remember the highground is your friend