First, allow me to officially state that you should approach this conservatively. If you have little honing experience, it's easy to make a razor duller than sharper and difficult to get it back.
That said...
I don't think your razors are in need of a touch-up. You did your touch-ups on a pasted strop, which is fine, and you seem to have had good success with it. But one of the typical things of pasted strops is that they convex the edge a little. At first that puts some new keenness on the edge, but there's always going to be a point in time where the very edge becomes so convexed that it's almost round. That's not a fault. It's just the way of the pasted strop. At that time, it is time for honing. Something tells me that you probably have got the maximum out of the pasted strops. Am I wrong in assuming that the last pasted touch-ups did not nearly work as well or as longlasting as the first ones? If so, that's just more evidence that the very edge is pretty convexed by now.
It takes some steel removal to hone the "cheeks" of the convexed bevel into straightness again. It is very unlikely to achieve that on a Coticule with water. Hi_bud_gl shouldn't dismiss Ben.mid's advice so bluntly. 100 laps on a Coticule with water is nothing outrageous. 100 laps may be outrageous on many fast cutting synthetic hones, but certainly not on a Coticule with water. (slurry is an entirely different story) I also happen to agree with Ben.mid that it probably takes at least your Belgian Blue with slurry to deal with the situation and reestablish a good keen bevel with flat planes. If at one point you decide to go to the Blue, you'll actually need 70 to 100 laps on the Coticule with water to finish after the Blue with slurry. Keep the slurry on the Blue very light, a hint of purple in the mix is enough and work in series of 30 laps, checking with the TPT in between. Once the razor feels extremely sharp and shaves armhair extremely well, finish on the Coticule with water. Add a drop of dishwashing soap to the water (one drop for a small mug with water). Rinse the razor well between different stones. Strop 60 to 100 laps on clean leather before test shaving. If the shave is very reasonable but still below Lynn's standard, try about 10 laps on your pasted strop. Because all convexity is gone, the pasted strop will do its magic again.
Good luck,
Bart.