@ Leadsled
Sure, night is higher risk than day
Twin can be safer than single. Certainly if failure when established in the circuit. Twin may not be much better if one fails at or immediately after take off.
Have to wait and see what happened here. Single failure immediately after take-off? - twin may (or may not) have helped. Other failure? - twin would probably not have helped. Loss of orientation and CFIT? - twin would not have helped.