Obviously, if you must have more than 6 inputs, which we don’t recommend, use the Sparse Nets.

If you are using inputs that do not "look back" in time, use the Recurrent Nets. Most indicators have a backward looking window, so Recurrent Nets are usually only appropriate for inputs like the one day momentum.  Using Recurrent Nets means you do not have to specify any lags of inputs as other inputs.

With regard to the Ward Nets and Jump Nets, it is difficult to tell which ones will work the best in any given situation. The best thing to do is try them both.