If you have five reverbs and one delay, Joe’s example results in 25 programs right there.
Not sure how you came up with 25 presets when I literally listed all the combinations OP wanted.
All I meant was that solving the problem by creating a different program for each reverb and each time division results in 10 programs for the OP’s specific example.
But if one wanted to do this for five favorite reverbs instead of two, you’d need 25 programs to cover that.
Just different ways to skins the cat, and they are many (ways) here.
The real problem here seems to be that I don’t know of any dual-series delay algorithms I think the OP would need to achieve his 1c. 1d. 2c and 2d examples.