In advanced flow I connect “calculating” variables in series with other cards. In theory it should start the next in line when it has finished it’s job.
Not sure if there’s any calculation taking more than 1s. You can measure it with a stopwatch: let it start when the variable starts the calculations, and let it stop by using the card @Rmb proposed.
Maybe unrelated, but nonetheless:
In standard flows you always need to add a 1s delay, because all action cards get fired at once without using delays.
