Babaisboss and Vikas are right. The best route will be
Faisalabad, Samundri, Rajana, Pirmhal,sundhilia wali,abdulhakeem, Kachakhoo, khanewal n then multan. Shortest with reasonable road and no expected traffic jams.
Jhang Kabirwala route I had used once some 3 years back but at that time all the road from from Mulho Mor onwards till khanewal was under construction. Now, as spectra is saying the road is newly completed so it should also be fine now.