UD RoC last mission is hard if you play normally units and trying to intercept attacks.
Also select this difficulty, if you want to quickly follow the story rather than take time to beat some challenging encounters.
The difficulty levels have been tweaked, normal is now much more difficult, however hard is pretty much unchanged. Warcraft 2 is my first video game and I'm really eager to play a campaign with the Warcraft 3 standards, with the Reforged graphics (and the amazing graphic work you seem to be doing). i like how difficult this game is, it gives u a challenge and you do. It was a long time coming, but when Warcraft III was finally released, it more than exceeded expectations.
Come on in! They made a pact, long ago, to fight against the forces of chaos using its own terrible powers against it.