According to Islamic scholars, it is not permissible to combine the `Asr and Maghrib prayers together. Ibn Hajar al-Haythami explicitly stated that these two prayers should not be combined. Similarly, Al-Nawawi also emphasized that it is not allowed to combine `Asr with Maghrib.
The only prayer that can be combined with another is `Asr with Zuhr. This practice is based on the reports from the Prophet Muhammad (peace be upon him) and his companions. They would sometimes combine these two prayers due to travel or other valid reasons. However, it is important to note that this combination is limited to `Asr and Zuhr only.
The scholars have provided clear guidance on this matter, and it is important for Muslims to adhere to these rulings. Combining prayers is not something that should be done without a valid reason or without following the teachings of the Prophet Muhammad (peace be upon him).
In terms of personal experiences, I have not encountered any situations where `Asr and Maghrib were combined. The prayers are performed at their appointed times, and it is generally understood that they should not be combined.
It is not permissible to combine `Asr with Maghrib or any other prayer except for `Asr with Zuhr. Muslims should follow the teachings and guidance of Islamic scholars in matters of prayer and strive to perform their prayers at their designated times.