Hi , 
1. I would like to know if Si8751 is suitable to drive large FET (IRFP7718) with gate charge of 552nC and CiSS = 29550 pF . ( as in the data sheet the gate capacitance is assumed to be 100pF_). 
2. The switching frequency of the load is slow at 1Hz. The load is a 20,000uF capacitor . The Supply voltage is a 48v battery. will this cause stress on the FET ? as it will see the load as short circuit and stay in linear region for app 10ms ( my calculations for TT connected to GND) 
3. I will use a 100pF capacitor from MCAP1 to FET Drain for miller clamp . Any comment on making circuit more robust and reliable ?