Time 0: Presto
Time 1: Step
Time 2: Violent Flourish
Time 3: Wild Flourish
Time 16: Step
Time 22: Violent Flourish

So that's 5 proc JAs in 22 seconds. It costs you 20 TP and generates 10 (Violent Flourish). So you need to have one attack round between Wild Flourish and the second Step.