It depends on what your broker offers in a sense, and in part your faith that the broker can make good on their offerings. I like the idea of a small acc (relative to your risk capital) in the sense that if SHF, regardless, youre in a position to negotiate a deal.
As for 'robust strategy'. If your trading big size (relative to acc) youre at big risk, period. If youre trading with stop and market orders, ie indicated price or worse, then you cant really define your risk imo.
If your idea of risk management is a full acc. Say 2% over 20 pips from entry to your stop @2580 in GBPUSD the other night, well, your ideas re risk might be redefined when the fills come in.