Most philosophers who are non-consequentialists are pluralists that think consequences are very important, so they can still use standard arguments to support the idea that reducing x-risk is important. A lot of non-consequentialism is about moral prohibitions rather than prescriptions, so I suspect most of it would have little to say about altruistic considerations. And of course a lot of it is loose, vague, and indeterminate, so it would be hard to draw out any comparative claims anyway.
Most philosophers who are non-consequentialists are pluralists that think consequences are very important, so they can still use standard arguments to support the idea that reducing x-risk is important. A lot of non-consequentialism is about moral prohibitions rather than prescriptions, so I suspect most of it would have little to say about altruistic considerations. And of course a lot of it is loose, vague, and indeterminate, so it would be hard to draw out any comparative claims anyway.