Did you try some outer blades with e.g. basalt or glass fiber?
KTS Foundation GF.K (koto, glass fiber, ayous, kiri) but also their Foundation ALC is slower than most other ALC blades 1), Loki Rxton 5 Pro Outer (koto, basalt carbon, ayous, kiri) or Loki Rxton 9 Pro Outer (koto, basalt GNF...