I find it hard to answer this question because every trader should find a strategy that best fits their personality (e.g. tolerance to drawdown). However, what I can say is:
1. You have one year to complete the challenge. If you take a loss, walk away, reflect and apply your strategy again. There is no real-time pressure as other trading firms.
2. Do not cap your upside by having a fixed TP. A fixed SL is a must, but have a flexible TP to maximise your gains.