Wizard tactics

The Wizard is the do-anything (except healing) versatility spellcaster. All wizards compulsively scribe every scroll they meet. The wizard's most important contribution to a group is to cast a situation-specific spell to survive a particular challenge. This can mean Jump, Feather-Fall, Sonic Resistance, Fire Immunity, or Invisibility. All of those spells are too rarely useful for a sorceror to study, but when they ARE needed, they're needed bad. (In particular, Invisibilty is a must to survive certain "zone-in ambushes" in DDO). A single Fire Immunity on a melee warrior can defeat Greater Fire Elementals for much less energy cost than a sorceror shooting cold damage, or a cleric healing him afterwards. Annoying jumping puzzles can be skipped with Feather-Fall + Jump (but be VERY sure that the wizard has all his teammates buffed before he jumps himself!).

Also, Wizards can elect to repair Warforged characters, while sorcerors won't usually learn that spell. (Hang onto a "Greater Reconstruction" item, to wield when it's time to fix a WF)

Therefore, the wizard player is the one with the greatest need for preparation. You must know better than anyone else which spells are required for which missions. Re-memorizing at shrines inside a mission can help, of course, so keep a shrine in reserve in an unfamiliar place.