Isn't it obvious that the Titan is a strong ranged attacker in itself?

I'm not denying that. Did I say it was weak? I'm saying that by the time you build them and get a decent number, other, lower-tier ranged units will already be quite strong. And the game doesn't always last that long, and you don't always have the necessary resources.

Whether you can counter it or not, the discussion is about the usefulness of the Unicorn's bow for ranged units. It seems we won't convince each other, and we'll each stick to our own opinion.

But the point is about the strength of mages and how it increases more compared to other races when they have the Unicorn's bow, so it's appropriate to mention evasion, etc. Anyway, I don't like pointless arguments and I don't really want to convince anyone.

As far as I remember, Dispel doesn't remove the Disarming Ray, nor does Stone Skin.

Stone Skin only increases it by 12, while Disarming Ray reduces it to zero. You can't dispel the ray. Only with antimagic.

I'm not claiming that Stone Skin removes the ray (I misspoke about dispelling, I admit). Let me clarify. To negate Stone Skin, you need to cast Disarming Ray three times (just in case, by "negate" I mean reduce the target's defense by more than Stone Skin increases it). Stone Skin is applied to all creatures, while Disarming Ray is an area-of-effect spell. So, how many times would you need to cast Disarming Ray to reduce the defense to 0? Since the hero is Faiaz, he'll have Dark Magic, so wouldn't it be logical to use not only Disarming Ray but also other Dark Magic spells, such as Berserk or Dominate? Okay, let's say Faiaz only casts Disarming Ray on everyone. Will the opponent just stand there, or will they attack and cast buffs on their troops? And when the defense is reduced to a critical level, you can cast antimagic, which the Knight always tries to get when playing against Dark Magic (of course, it might not be available, it depends on the map and luck).

MjTh, fire resistance also reduces fire damage by 50%, which is very unpleasant for Nazir, the fire specialist. He can definitely damage the Knight's army, no doubt, but achieving victory will be difficult.