I have never had to use more than 500iuED of Hcg. I use 500iuED for 3-6 days mid cycle, I use 500iuED for about 10 days post cycle.
IMO, 550mgs EW for 10 weeks is a low dose cycle and 500iuED for 10 days should get your balls big again. I suggest just starting with 500iuED, if you need to you can always bump it up. Next time hit some Hcg mid cycle for a few days.