Philosophy and Theology

I apologize for the short post. I was going to continue with God and Eternity but yet another curve ball has come my way, effectively cutting my time from an hour and twenty minutes to merely twenty minutes. This is not nearly enough time to tackle the issue the way I would like to so I will make another attempt tomorrow.

This is a basic question that I have been thinking of for a long time and am looking forward to some counter perspectives. I will frame the question based on Millard Erickson's "Christian Theology" text.

1)Revelation, rather than philosophy, determines our theology
2)Due to this our ontology is informed by revelation rather than philosophy (example: I don't believe in reincarnation because scripture clearly teaches otherwise. An Eastern philosopher may have many philosophical arguments to the contrary, but I do not consider them valid, even if the argument is good, because God has revealed the true nature of reality).
3)No commitment to one philosophical system is necessary even though philosophy is employed in systematic theology.
4)Erickson insists that theology is autonomous from philosophy.
(I highly recommend reading Erickson's text, especially in this section that starts on page 56.)

Even though there is no singular commitment to a philosophical system, does that mean that systematic theology is truly autonomous from philosophy?
Certainly we are not going to check with Sarte to see if we have it right. However, is there some sense where philosophy could fall under the heading of general revelation provided that it does not contradict scripture and that we do not except a philosophical system over a theological one that is rooted in scripture?
There can be no doubt that some of the discoveries of the Greeks were amazing in the sense that they confirmed what scripture had been teaching for thousands of years before them and they didn't have the benefit of scripture to influence them. In "Twilight of Idols" Frederich Nietzsche accuses Plato of going to Egypt and being trained by Rabbinic scholars because his thoughts were so close to what scripture teaches.
Your thoughts?