Being saved from the torment of the grave occurs for those who recite Surah Al-Mulk [Quran 67] alone, and the fact that there is a Hadith about the desirability of reciting Alif, Lam, Meem Sajdah ...

because you don't have time to recite another surah since you have to follow the imam and go into ruku with him? All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none ...

The best form of remembrance is the Quran and the best way to read the Quran is in your nawafil, Qiyamu-layl or supererogatory prayers. This is the khairu Dhikri. As you recite your Quran daily ...