High research cost is not recomended for games against the AI. They only have one set of files. If they research Dreadnaughts before Phased Shields with low tech cost, they will do it with high tech cost as well. And they won't know to build more research facilities then normal either.
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I used to be somebody but now I am somebody else
Who I'll be tomorrow is anybody's guess
Are you playing against TDM AIs ? They usually follow more cunning research path
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It is forbidden to kill; therefore all murderers are punished unless they kill in large numbers and to the sound of trumpets. - Voltaire