Combinationalism is comprehensive, and recognizes that a world-view must cover ail that is in the world. It is adequate within certain contexts. When testing between world-views, you cannot presuppose the truth of a given framework without begging the question. It does not make sense to speak of an Act of God, unless there is a God who can act. If empiricism is not an adequate test for truth, and rationalism is not adequate, then combining them will not hold truth any more than two leaky buckets in series will hold water.
Facts require a viewpoint.
While raw rationalism has serious flaws, it does establish for us that truth is logical. Logic has been defined as the mental recognition of the order of reality. Therefore, if you can reason in a logical manner, the truth will eventually surface. Truth can not be directly self-contradictory. Truth can not be indirectly self-contradictory.