Tactics for Rampart.

The Swamp is one of the weakest castles, especially with the Barbarians. It only makes sense to choose it for medium and small maps. Why? Because magic has always been dominant in Heroes 3. As everyone knows, the magic in these castles only goes up to level 3. IMHO, this is a HUGE drawback.

Well, I wouldn't be so quick to dismiss the Stronghold. IMHO, it's a very strong castle and my favorite in Heroes 3. The high attack power it provides early on compensates for the lack of magic, and you can acquire higher-level spells by capturing cities, which is quite feasible with such strong attack and troops.