This is not a matter of one side strategizing to win a war against another. The strategy for someone representing the US is to determine, at this time, what the constitutional grounds for impeachment are, what standard of evidence makes sense, and whether sufficient evidence exists on a plethora of potential impeachable offenses in order to draft into articles of impeachment and vote on moving them to the Senate for trial.
The truth here is that, in some pieces of this, e.g. instructing staff to defy subpoenas for documents and testimony during an impeachment inquiry with no rational legal argument, the exercise is academic. There is no doubt of that being impeachable conduct detrimental to the US and of Trump's guilt.