Warcraft 3, Awakening of Stormrage | Ultra Wide 

Yeah this mission is definitely one of the harder ones, at least if you want to actually destroy the Orc base. Nice to see you eventually figured out that good ol' runby is the way here. It probably is possible to destroy the Orc base on the highest difficulty, but it would require some EXTREMELY good macro and micro. Just running by is the best option - nothing to be gained by destroying it aside from satisfaction of a full-clear.