Well, if you're talking one-on-one-on-one ( ), clearly, the Igazra would demolish the Zidara and the Azdara.
However:
If, as you said, it's an enhanced Azdara, it just might win (though it'd take a LONG time)
If we're talking a more usual battle, say, an Igazra, two Zidaras, and an Adzgari Warship, matters become more complicated. I really couldn't say.
Glenn
PS: Of course, the way the AI works, each ship picks an enemy and beats on it till it dies. If two of the three pick the same one as their foe of choice, that one will clearly be the loser.
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“If a little knowledge is dangerous, where is the man who has so much as to be out of danger?” - T.H. Huxley