After playing a wizard through the game on POTD I felt like it was missing out compared to every other caster class. Druids have spiritshift, Ciphers have soul whip, etc. On POTD the fights tend to drag on for quite awhile and 3 casts per encounter was underwhelming. One idea I have to give single class Wizards a boost is to give them a talent to use two empowers per encounter on their 8th or 9th power level. This way, on fights that are tough and drag on, they have 4 spells per level to cast.