It is not lawful to combine two salah at the same time instead of Arafah and Muzdalifah. However, in case of compulsion they may be offered together in a way, for example Zuhr is offered at its last time and Asr is offered at its starting time. Likewise consider the other salah as well.
Allah (Subhana Wa Ta’ala) knows Best
Darul Uloom Deoband