The best way to get stronger is buy lifting the most weight possible over the longest range of motion. Anything other than a low bar back squat is going to reduce range of motion or put the body in a position that would not allow a person to access the range of motion or the resistance they could otherwise use. Making submaximal resistance feel tough or heavy is just putting your body in a position to underachieve, which is the opposite of effective training.
Asymmetric loading puts your body in a compromised position, which makes it operationally weaker, reduces overall stress on the target muscles, and increases chances of an injury. A symmetrical squat will stress every muscle that makes up your "core" far beyond what you can do by loading it asymmetrically because you will have a solid base and will be stressing these muscles with much more weight.
Something is always better than nothing. Lots better, so do what you can with what you have. If all I has access to was a set of dumbbells I would increase rep ranges to allow me to accumulate the same stress as if I were working with a heavy barbell...the only difference being is I wouldn't gain the experience in working with a barbell or a heavy low rep stressors.
Asymmetric loading puts your body in a compromised position, which makes it operationally weaker, reduces overall stress on the target muscles, and increases chances of an injury. A symmetrical squat will stress every muscle that makes up your "core" far beyond what you can do by loading it asymmetrically because you will have a solid base and will be stressing these muscles with much more weight.
Something is always better than nothing. Lots better, so do what you can with what you have. If all I has access to was a set of dumbbells I would increase rep ranges to allow me to accumulate the same stress as if I were working with a heavy barbell...the only difference being is I wouldn't gain the experience in working with a barbell or a heavy low rep stressors.