First, disallow any hearsay evidence.
Stipulate for the record the depth of Ukrainian corruption and interference in the 2016 election.
Also enter into the record Ukraine (12978) – Treaty on Mutual Legal Assistance in Criminal Matters signed by William Jefferson Clinton. Refer to both in any cross examination of Demonrat witnesses.
Spend the limited time and focus overcoming Republican objections to getting the damn "whistleblower" to testify.
Subpoena Ciaramella, Vindman, sans uniform, and Schiff.
And let the games begin.