How long do you face lather for? I personally got a lot more prep value out of spending more time face lathering than having pre-shave showers. I used not to be able to shave well without a shower, now I can shave any time.Ah, if only it were that easy. My prep with a shower where I keep my face constantly wet and then face lathering only produces 2 reliable shaves with a Feather. I have gone 3, but that 9th pass is always a disappointment. But I can't get 14 shaves from any blade. My best is 8, and even then 7 would have been the better choice.
Also, have you had a look through the excalibur thread? Lots of very useful discussion on the different ways we can improve our techniques, such that longer blade life is a natural byproduct (rather than something specifically sought as an end in itself).