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Combine the Romanian and sumo deadlifts, which you'd do with a more narrow stance and a more upright torso.

Here's why: For many, the hybrid deadlift is a smart substitute for traditional deadlifts. Why? Two reasons:

1. The wider stance is easier and more natural for the majority of lifters to do while maintaining the alignment cues.

2. This starting position keeps the barbell closer to the hip joints than the conventional style, which provides a shorter lever arm. This helps you get a greater mechanical advantage while placing less overall stress on the lower back.

One study did a biomechanical analysis of straight bar and trap (hex) bar deadlifts and found that the trap bar deadlifts placed less overall load on the lumbar spine because it also involves a shorter lever-arm. However, not everyone has access to a trap bar. – Nick Tumminello

The overhead squat requires a more upright posture than the back squat and you're forced to execute the squatting pattern precisely, otherwise the bar would drop to the front or back. You can see the high concentration levels of the athlete and accurate execution. Mastering the overhead squat can help your back squat technique. ­– Christian Bosse