Nope, u don't need a Titan.
The best mix is no Magic Cannon or Titan, infact.
Imp / Goblins (They're called Goblins though).
Centaurs.
Underwater Maidens.
Succubi.
Witches.
And you should also use the Dragon Riders.
This gives suitable and rapid defense at the frontlines while you have forces backing them up in a safe position.
You also need effective Powers, including:
Comet.
Pheonix.
Healing Wave.
Lightning.
Hercules Strength.
Athena's Shield.
This allows a constant pinning down onto the enemy along with offensive boosts with strong Ally buffs.
- H