MQM have two options now :
1 - To resist PTI through violance ( which is actually their traditional option , they started it through zahra shahid murder )
2 - To overhaul its internal party structure and see where they were lacking ( they are doing it right now but i'm very sure this overhauling will never work , there is only one problem in MQM , only one possible way of overhauling , ALTAF HUSSAIN REMOVAL and we know its not possible )
So ultimately MQM would go with option number 1 , they would start terrorizing PTI politicians and (khakam badahan) after election storm settlement , you will see a some more murders of PTI .
For me there is only one option:
BAN MQM all political activities . simple but difficult as well