Discussion of level 4 monsters.

The monster, for its size and appearance, is weak, just like the Titan. I would increase the Titan's HP to 360.

I wouldn't call the Titan weak. As the author of the previous post, OptiMal, said:

Well, in the Castle of Life, units are well-supported by tactics.

The same can be said for Haven – nobility is a powerful thing. A well-developed hero with nobility is a mega-resource and creature generator, which puts him on par with the Black Dragon. Also, Haven magic has spells to enhance or protect its archers, such as Accuracy, Mirage, Slow, Blind, Mirror Image, Hypnosis, and many other useful spells. Besides, we are given neighboring schools of magic for a reason. A Haven mage with Life magic and 1-2 Titans is a formidable force...