Ideas and suggestions.

Apparently, you either need to heavily invest in him or not bother with him at all if it's not absolutely necessary. That's how "rush" strategies usually play out:D
And having your main hero attack "rush" units is not a kingly thing to do!)

What do you mean by "the same"?)) Also, keep in mind that this is often a time-sensitive situation: either you've already taken the utopia, having spent a considerable amount of resources, or you're about to, and against a "rush" unit with 7 speed and a basic lightning bolt attack, you need a *lot* of resources. And what does it mean to "not bother" with it if it's not critical? Just let it capture your castles and scout your territory peacefully?) Such "rush" units that get close to one of your cities are usually killed with a quick, powerful main force (which doesn't necessarily mean using your main hero) like a few angels and a stack of archers, so as not to lose too much. But with an Armageddon's Blade with a positive effect, it becomes an easy autoloss.