Tried a bunch of combos in my Bess (11ga.) last summer and ended up dumping the cushion wad.
Instead, I've settled on a over powder, finger full of lube (BB or Bee's Wax & olive oil), then anouther overpowder wad.
At the pattern board I do find where the wads hit, however, the shot pattern is intact leaving me to believe the wads are only following the shot and not blowing through.
The 68 gr. to 1 1/4 shot sounds a bit,,, unbalanced (?) to me. But if it's working, good enough. I'm using 95 gr. (2Fg.) with 1 3/8 for duck & geese. 1 1/8 w/ 80 gr on close things like pheasants, and squirrels.
Experimentation is definately called for.
Loading this way my fouling stays nice and soft. After 2 - 25 rounds at sporting clays I was still shooting and loading with no signs of objectionable bore fouling and cleaned up nicely. Trick is don't spare the lube.
Perhaps the hydraulic action of all that lube between the wads is doing something positive on cushioning the shot? Maybe for BP a cushion is anouther old wives tale? I've no clue,, but it works.
Lubed felt & fiber wads were a miserable waste of time & money in my case.