1.Orb
2.Phase
3.Orb
4.Rift
5.Orb
6.Coil
7.Orb
8.Rift
9.Rift
10.Rift
11.Coil
12.Phase
13.Phase
14.Phase
15.Stats
16.Coil
17.Whatever the hell you want

Now what this skill build suggest, is proper lane harassment and decent spamming of nuking spell (Orb is your primary nuke in this build). Abuse the range of the orb. Even though the damage increase is rather minor, this is mostly for the fact that Orb doesn't increase MP cost over time.