What do you mean, "in this manner"?
Every dollar you are under the cap is essentially amplified at the trade deadline. I don't have the actual numbers on me, but let's pretend the season is exactly 80 games and the trade deadline happens with 20 games left. If you run $2M under the cap for the first 60 games, you can acquire $8M in salary at the trade deadline because $8M over 20 games is the same salary as $2M over 80 games.
The math was super simplified there because I'm too lazy to actually look up how many games happen before/after the trade deadline but that's essentially how it works. The only thing that doesn't help save cap space is LTIR - putting a player on LTIR lets you exceed the cap by their cap hit (eg. if Booth goes down, we can go 4.2M over the cap while he's on LTIR) but you still only save cap space by how much you're below the actual cap.
Without running the actual math, I think if we waived Alberts now (and didn't replace him at all), we'd be piling up roughly $2.4M to use at the deadline. Very rough math and misleading because we'd almost certainly call up a forward making as much as him to replace him if he was sent down.