What is your favorite ultimate ability for that class?

I got a Champion Archer Orc while completing a campaign. The catapult destroyed towers or gates in 70-80% of cases with the first shot. Regarding mages. My friends and I play Hotseat and make agreements. We don't attack each other until we clear the entire map. We even divide the territory in advance. But when I saw that one of my friends started leveling up a Champion Archer Mage, I told him that I would break the agreement as soon as I got 5th-level spells, unless he immediately learned 2 schools of magic. He immediately learned the relevant magic (there is a mentor on the map). I think it makes sense to level it up only when playing against the AI. And even then, not on every map. The Call of Urgash combined with the aura of speed helped me complete the entire 5th mission of the original campaign without any losses. Including defeating 72 emerald dragons at the end of the mission without any losses. However, I played in version 3.0 and used vampirism in some battles. But in this version, there is no "Summon Ship" spell.