What he mentions sound very much like Alicante runway 10 ILS Z
I would hit the 18 DME at the required altitude with at flaps 1 then arm the approach as you’re cleared. You should be hitting the step down altitudes at approximately the altitudes you need to be at.
it’s not ALC but it’s similar I agree but the fixes outside the FAF are a little less challenging. If y the 4200 at D14.6 was say 5000 would you accept descent on the GS if at 14.6 the baro read 4600’.