As a thought exercise, I was wondering about making Wizards a little more like the other classes, in that their class features and secondary attributes actually make a regular difference in builds and in play. So, I wanted to begin by grouping implements with attributes and general power categories. Here's what I've come up with so far:
Wand: Dexterity: Single-target attacks (rays, missles, etc.)
Staff: Constitution: Blasts and Bursts, both close and area
Orb: Wisdom: Condition-inflicting spells, e.g., Sleep
Tome: Constitution: Summoning and Conjuration
How's this look?
EDIT: Constitution is now the prime stat for tomes.