aas eq deca sust

Hi there, in a hurry so i'll make this quick. I'm currently on second cycle, 900mg week sust 600mg week eq, I'm just wondering if adding 300mg week deca will make much difference? Gona be on cycle for 20 weeks. Stats are 6"1 192lbs 17%bf. Any advice will help. Dont really want to be taking more...