It should cover with slack i guess, it should LTT by 7 am tomorrow. It will start back by 8 making it 2 hrs delay from start. Still, its a better bet as it will reach SC by 11 pm and goes via GDV. I guess, all trains are reaching with 2 to 3 hrs delay. Also, as LTT - VSKP doesn't have stops after RJY, it will be less crowded. 12738 is also good, if you get Tatkal :).