(Hero - Rogue) in Heroes 4

Uh, I may not be a strong player, but I always have a unit with logistics and a unit with tactics in my army, and it's obvious that speed of clearing is important; it goes without saying. I'm talking about something else... about a single rogue unit. About the hyper-efficiency and hyper-profitability of a lone rogue, its ability to capture artifacts and resources with minimal losses. After I once used a rogue in this way, I can't resist the temptation to hire one or two or three of them.
It should also be noted that I like to play on large maps, and I play against the AI... which I often have to strengthen because the AI in Heroes of Might and Magic IV is a joke...