Ewes will handle those counts with no problem----don't bother worming
Cocci ---that's a low count by any standards and you don't know if these are pathogenic cocci species or not so again don't worry unless you have ewes with black/runny back ends etc
If your lambs have a similar total FEC of 400 epg you will have to judge as in my experience this is borderline treatment zone
Consider if they are scouring, growing well, what fodder they have ahead of them and how old they are in making a decision
If they are clean bummed, growing well , on clean lush clover and over 16 weeks old they may not want treating ---if they have poor grazing , are younger and not thriving then worming may be in order
It's not a clear cut decision