steps steps steps
They can be spectacular to watch, and getting up one when your not convinced you can is one of the best feelings in trials. BUT people also are more likely to be hurt on them, a little bit of fear is fun but everyone has a limit.
In my experience of setting out trials you can never take marks off the top guys with big steps, but you can spoil everyone elses day. The technical tight section or the slippy bankside or river will take marks off everyone but nobody generally gets hurt, no bikes get broken and the top guys loose marks.
so make your pro class harder just dont make it too daunting, its normally the turns that take the marks anyway as given sufficient run up a capable rider will get up most things.