If I solve Allen DLP completely along with HC Verma do i need to solve DC Pandey as well considereing that I am a drop out and lacked practice in my previous attempt??

My suggestion,first do HC verma and DLP. There are alot of quentions in there to practice. For maths use Objective RD sharma. Doin all this will take alot of time,so if after solving all this, if time is left do questions from other books. Best of luck