These resources
Rusch, William G., ed. The Trinitarian Controversy. Translated by William G. Rusch. Sources of Early Christian Thought. Philadelphia: Fortress Press, 1980.
Edgar, William, and K. Scott Oliphint, eds. Christian Apologetics Past and Present: A Primary Source Reader, to 1500. Vol. 1. Wheaton, IL: Crossway, 2009.
are collections of patristic documents. Unfortunately, they lack milestones.
Yes, these are anthologies which should have milestones not a catena which I would not expect to have milestones.