I have a coarse beard and sensitive skin. Unfortunately, I also have a fast-growing beard so that I have to shave every day or two. I never go more than 48 hours between shaves as I find that waiting longer makes shaving more difficult. Fortunately, I do not have an issue with ingrown hairs, so I usually do a four-pass shave: WTG, XTG, ATG and a clean-up pass. You might find that increasing the frequency of your shaves might make shaving easier. It is worth a try. If you shave every day, a two-pass shave might be just fine.
Since you have an issue with ingrown hairs, I suggest your passes with WTG and XTG rather than WTG and ATG. Also make sure you "map your beard" so you know exactly which way the hairs are growing. You may find that hairs grow in different directions on different parts of your face and neck. For example, on my cheeks, the hair grows downward, but when I hit my jawline, the hair grows sideways from chin to ear, so I have to change shaving direction when I reach my jaw.
Although I like the sharpness of Feather blades on the first couple of shaves, my coarse beard destroys the Feather edge. I cannot even make it through the third shave using Feather blades. However, if you are only doing a two pass shave, they may last a while longer. However, if you only shave 2-3 times a week, the first pass of the shave is going to be really hard on the blade. Other blades that are very sharp that you might want to try are: BIC Chrome Platinum, PermaSharp Super, Nacet, 7 O'Clock Super Platinum Black, and Personna Platinum (formerly from Israel, now also from Germany). I also love the Dorco Prime Platinum STP301 blades from Vietnam. Be sure you get the blades listed as "Prime Platinum" not the ST300 or ST301 blades.
Some people have recommended Astra SP blades. While they work quite well with those who do not have coarse beards, I find that they are not sharp enough for my coarse beard. If you have a coarse beard, they might not be sharp enough for you. They are pretty cheap, so you are not risking much if they do not work for you.
Although those with less coarse beards may be able to shave before showering, if you have a coarse beard, showering first is probably helping to hydrate and soften your beard. Still, you might want to try a shave or two before showering just to find out.
You might want to check out some other soaps. MWF is a good soap, but it takes some time and effort to lather, as you have learned. Once lathered, it does an excellent job. Stirling is a very good soap, but there are better soaps available for those with sensitive skin. Since it sounds like you tend to use a lot of short, buffing strokes as part of your shaving technique, you need to find a soap with excellent residual slickness and excellent cushion. Just because a soap has great primary slickness, does not mean that the slickness will be maintained after you scrape off the initial lather. Some soaps that I highly recommend for sensitive skin (in alphabetical order) are:
Ariana & Evans Kaisen base
Declaration Grooming Milksteak base
Gentleman's Nod Cardinal base
Grooming Dept both Kairos and Nai bases
Highland Springs Soap Co. tallow base
Murphy and McNeil Kodiak base
Oaken Lab V3 base
Wholly Kaw Siero base
Zingari Man Sego base
Any of these soaps will be a lot easier to lather than MWF and will produce a more protective lather than Stirling. They are lots of other good soaps available, but these are the best I have used. They might not be as economical as Stirling, but for those who have problems with irritation, it is worth checking out these elite level soaps.
Since you have an issue with ingrown hairs, I suggest your passes with WTG and XTG rather than WTG and ATG. Also make sure you "map your beard" so you know exactly which way the hairs are growing. You may find that hairs grow in different directions on different parts of your face and neck. For example, on my cheeks, the hair grows downward, but when I hit my jawline, the hair grows sideways from chin to ear, so I have to change shaving direction when I reach my jaw.
Although I like the sharpness of Feather blades on the first couple of shaves, my coarse beard destroys the Feather edge. I cannot even make it through the third shave using Feather blades. However, if you are only doing a two pass shave, they may last a while longer. However, if you only shave 2-3 times a week, the first pass of the shave is going to be really hard on the blade. Other blades that are very sharp that you might want to try are: BIC Chrome Platinum, PermaSharp Super, Nacet, 7 O'Clock Super Platinum Black, and Personna Platinum (formerly from Israel, now also from Germany). I also love the Dorco Prime Platinum STP301 blades from Vietnam. Be sure you get the blades listed as "Prime Platinum" not the ST300 or ST301 blades.
Some people have recommended Astra SP blades. While they work quite well with those who do not have coarse beards, I find that they are not sharp enough for my coarse beard. If you have a coarse beard, they might not be sharp enough for you. They are pretty cheap, so you are not risking much if they do not work for you.
Although those with less coarse beards may be able to shave before showering, if you have a coarse beard, showering first is probably helping to hydrate and soften your beard. Still, you might want to try a shave or two before showering just to find out.
You might want to check out some other soaps. MWF is a good soap, but it takes some time and effort to lather, as you have learned. Once lathered, it does an excellent job. Stirling is a very good soap, but there are better soaps available for those with sensitive skin. Since it sounds like you tend to use a lot of short, buffing strokes as part of your shaving technique, you need to find a soap with excellent residual slickness and excellent cushion. Just because a soap has great primary slickness, does not mean that the slickness will be maintained after you scrape off the initial lather. Some soaps that I highly recommend for sensitive skin (in alphabetical order) are:
Ariana & Evans Kaisen base
Declaration Grooming Milksteak base
Gentleman's Nod Cardinal base
Grooming Dept both Kairos and Nai bases
Highland Springs Soap Co. tallow base
Murphy and McNeil Kodiak base
Oaken Lab V3 base
Wholly Kaw Siero base
Zingari Man Sego base
Any of these soaps will be a lot easier to lather than MWF and will produce a more protective lather than Stirling. They are lots of other good soaps available, but these are the best I have used. They might not be as economical as Stirling, but for those who have problems with irritation, it is worth checking out these elite level soaps.