It is unfortunately not that simple and depends on strategies.
For robustness and speed in production - SierraChart...but it has rudimentary backtesting capabilities and nothing about portfolio-level mngt...
MC is fast (Powerlanguage gets translated to C++ and runs as fast as C#) and more or less reliable in real-time, but lacks proper WFO/ML framework (and has several other quirks and limitations)...which brings us to Zorro.