I've got 8 showtec movingheads, 4 movitec movingheads, 4 futurelight scans, 2 martin movingheads, 2 martin wizzards, 2 martin acrobats, 24 colorchangers, so 400 steps is not to much
I think 1000 steps should be enough for now, when I make a chase with several fixtures I like to program them 1 by 1, so step 1 is fixture 1 at position 1, step 2: fixture 2 an position 1, step 3: fixture 3 at position 1, and so on, till I have a nice chase.
I know this way of programming takes a lot of time, but it gives a nice show to watch. We've got 2 fat frogs now, and sometimes with a large production we use almost all steps. I'm sure when we buy the Mambo that we will run out of steps. It's the only reason why we're not going to buy it right now.