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I've only played with the Swamp faction so far.
1) Hydras were constantly used and performed well.
2) The main strength of this faction is the Wyverns; they fit perfectly into the Swamp army and can be easily upgraded in their native castle.
Brokhild in The Eastern Expedition is a true powerhouse on Balanced difficulty.
In some foreign rule sets, Conflux and Necropolis are banned due to their secondary units. Or, they made Conflux and Necropolis secondary factions because they were banned. I'm not sure.
1) Hydras were constantly used and performed well.
2) The main strength of this faction is the Wyverns; they fit perfectly into the Swamp army and can be easily upgraded in their native castle.
Brokhild in The Eastern Expedition is a true powerhouse on Balanced difficulty.
In some foreign rule sets, Conflux and Necropolis are banned due to their secondary units. Or, they made Conflux and Necropolis secondary factions because they were banned. I'm not sure.