With an item that grants force damage, with empower and maximize if you invest in spellcraft diligently you can pull of some moderate damage from your offensive spells more so if you are in an ED that grants Cleric caster levels. I run a Harper Clonk that maxed spellcraft with an intelligence of 42. When I crit on BB I sometimes pull 480 damage even saved when I cast with a staff that gives me 144 force power with only maximize with 11 cleric levels and 5 from a divine ED. When a champ spawns I use that to weaken the mobs a bit before jumping into melee sometimes.
I know this is bent more on melee. Just something to consider when you are building your own temps. That is also considering you are in a divine tree that grants divine levels. Off destinies...not so much.