Haven buildings.

We won't consider tactics, as it's not always convenient to level up tactics for the Order faction. Unlike the Titan, the dragon-golem is a melee unit. Given its size and speed, it doesn't excel in defense, but it can hold its own in attack for a while. However, for a melee unit, its hit points are a bit low. Therefore, in battles with neutral creatures, a slight oversight can easily lead to the loss of one dragon. In Whirlwinds, the dragon had two significant advantages over the Titan: speed and cost. The Titan's strength lies in its versatility. It's effective both as a ranged attacker and in melee combat. It also synergizes well with Djinns and is protected against magic, as only Chaos has powerful offensive spells, and the Titan isn't vulnerable to them. The dragon, on the other hand, has very limited specialization. Moreover, after increasing its accuracy, the Titan's attack parameters will be higher than the dragon's. And for the Titan, a relatively small number of hit points isn't fatal because it won't charge into the thick of the enemy. If we consider combinations of Titans and Dragons with Nagas, which, as mentioned, are very effective in the final battle (especially on Equilibrium), it will be difficult to break through using only two melee units, even with magical support. However, Titans can effectively cover the Nagas, providing significant ranged support. Even at a glance, it's hard to say in which situation the dragon is better than the Titan. P.S. If we're talking about Equilibrium, Titans are clearly superior. Their cost is significantly reduced, and they have 30 movement points, which is more than the dragon.