Which monster do you like the most in Heroes 5 at level 7?

I never really admired the Titan's Lightning... I understand that it will be a cloud instead of lightning, and not together with the shot... Maybe the Storm Lord is physically weaker?

No, the Storm Lord will have the same characteristics as the Titan; everything is identical. By the way, the damage from summoning the storm is also the same; it lasts for 3 turns, while the Titan's Lightning deals damage of 30 * the number of creatures in the unit. The only difference is that the Titan's attack is not area-of-effect and does not give penalties to ranged attackers. Perhaps this ability will be fixed, as initially, it was planned that the Storm Lord would not shoot, but now this has been changed.