With Deleb being so weak, playing as Inferno became less interesting. The third shot certainly levels the playing field, but that usually happens closer to level ten... But still...
If something valuable is guarded by a strong group of neutral creatures at the beginning of the game (a mine, gold, an artifact...), then Deleb is the only one who can take it (or a Necromancer if they have enough mana for resurrection). That's why I love her - I don't want to wait, I take what I want!