Shorter method:

If one is unable to recite all these sooras, he should recite folowing
Tasbeehat-e-Arba’a 100 times; Al Hamd 100 times, Sura Tawhid 100 times, Ayatul Kursi 10 times. Salawat 100 times.
THEN Sura Tawhid again 1000 times instead of the many surahs. Refrence
Shaikh Mufid has also mentioned similar method. Syed Tawoos in Iqbal Aamal has also mentioned (if in safar/ travel) 100 times Sura Tawhid instead of all surahs.
Rajab 15 Aamal
Normal method
Fast on 13 , 14 and 15th Rajab
On 15th Rajab
After the obligatory Zuhr-Asr Prayer is completed, face the Qiblah and recite the following surah multiple times as in the table below:
Surah No. No. of Times Audio
Al Hamd 1 100

Ikhlas 112 100

Ayat al Kursi 2:255-257 10
An’aam 6 1
Bani Israel 17 1
Kahf 18 1
Luqman 31 1
Yaseen 36 1
Wassaffat 37 1
Ha Mim Sajda 41 1
Shoora 42 1
Dukhan 44 1
Fatah 48 1
Waqea 56 1
Mulk 67 1
Al Qalam 68 1
Inshiqaq 84 1
Al Burooj to An Naas 85 to 114 1 Click

Recite the Dua Umme Dawood in the next