I played mine to 16th or 17th level
I used a combo of scepter/focus & greatsword.
Against Melee foes;
I found leading off with scepter, fire a couple auto attacks as you get into range, and immobolize them with chains while putting smite on them. It keeps them in place for the smite to be effective. Keep firing auto attacks which slowly target the foe. Just start backing up as they come at you, while firing auto attacks, put on Shield of wrath and switch to Greatsword as they close in, and launch into your greatsword routine.
Against ranged foes, using wall of reflection while targeting them with your ranged attacks weakens them lots, then move in with greatsword to finish them.
Healing breeze was pretty cool, I liked using that to help heal groups I was with. Reasonably effective but cool looking.
I saved up skill points and bought the summon worm skill, it was 7 points so I thought it may be decent, but it didn't really seem that effective and felt disappointing for 7 skill points. The hammer of wisdom wasn't spectacular or anything but it seemed better than the worm and cost a whole lot less points to get.