On what system you are using to program this part. I would think if you are having to use that small of a cutter you want to leave no more than .002 to .005 anywhere for it to cut. I would probably use 2 of these tools with finish operations. The 1st finish operation would leave .0025 to finish and have a greater step over once you have done the operations you have listed above. By using a tool the same as you are finishing with as a semi-finish operation gives you more predicable results for the finish tool as well as what you can expect for the finish operation which will improve the quality of the mold which is always the bottom line on molds.