Playing a wizard may be quite challenging if you don't know what build to make and especially when you don't have too many items. I have found a new build which works perfectly for me for T1-T4, so I thought it would be nice to share it.
Since the Patch 2.1.0 in Diablo 3 Reaper of Souls, things have changed a bit for wizards. The most important change I noticed what the fact that now 2 handed weapons actually do pretty good dps, so you can choose either to wear a 2hand or a 1 hand + source.
Skill Build for Wizards, easy farm on T1-T4:
Primary: Electrocute - Surge of Power / Forked Lightning
Secondary: Arcane Orb - Scorch
1: Archon - Combustion
2: Black Hole - Blazar
3: Familiar - Arcanot / Sparkflint (Depends on how well you manage your Arcane Power)
4. Magic Weapon - Force Weapon