Please offer some advice.

Yeah... by the way, summoning is a cool thing... mostly I like to summon earth elementals... firstly, you can summon a lot of them, and secondly, they hit hard... in a few minutes, you can get about 100 of them - Awesome... Their only downside is that they move slowly... :(
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Pandora, you wrote in some thread (I don't remember which one) that summoning triples your army, and some guy wrote that it's good to earn vampires by fighting neutrals. I agree that summoning triples the army, but it's a pity that they don't stay after the battle... But vampires increase the army itself... so the expression "tripling" is more suitable for Necropolis, or rather, for vampires!!!