1. Waishan - scouts, luck, quick access to "Lucky Charm"
2. Iranna - furies(!), education with "Mana Attraction"
3. Letos - special ability (level 20 - 50% chance to poison any enemy unit on the battlefield), Darkness(?), depends on the neutral creatures and luck
4. Sinithar - archer from the start; initially, mana saving helps; good on fast maps, but then he fades somewhat.
5. Erin - attack and Chaos; the ability depends heavily on chance.
6. Kifrah - leadership; if "Empathy" were in version 1.6, she would be more worthwhile.
7 and 8 - Irbeth and Sorgal - weak; the first loses to Letos, and the second's ability is practically useless.