"Arbs" on stuff that big desks don't touch because of capacity (small mergers for example, you lever up on 2-3 small merger arbs per year and you are almost there);
DEX to liquidity pool latency arbs for shitcoins if you want a crypto example;
Edit: The other option is that if you are a trader in "special" markets (the best example is biotech/medstocks) where domain knowledge really matters being 4 sharpe is basically 1 good trade a year, and at 5mio USD AUM you are always at capacity.
I wonder why people always assume that the strategy would be algorithmic or systematic. How about global macro, long/short equity, or even plain long only done well ? Actually studying markets and assets fundamentally, and finding asymmetric bets ? There are plenty of people that have done that successfully over really long periods of time, I doubt markets are perfectly efficient just because some academics claim so, especially for bets with strong convexity.
"Arbs" on stuff that big desks don't touch because of capacity (small mergers for example, you lever up on 2-3 small merger arbs per year and you are almost there);
DEX to liquidity pool latency arbs for shitcoins if you want a crypto example;
Pure arbs (One of my friends who admittedly is not satisfied with 1mio USD comp did this trade: https://notion.moontowermeta.com/financial-hacking-etf-vs-ne... ).
Edit: The other option is that if you are a trader in "special" markets (the best example is biotech/medstocks) where domain knowledge really matters being 4 sharpe is basically 1 good trade a year, and at 5mio USD AUM you are always at capacity.