Top N items for a calculated Metric

hello everyone, 

1. I am using the below API call to get Top N items : 

https://analytics.adobe.io/api/{login}/reports/topItems?rsid={rsid}&dimension={dimensionId}&locale=en_US&dateRange={}/{}&lookupNoneValues=true&limit=10000&page=0

For an example when I run for top 2 items the api call returns Term 1 and Term 2 as I found out the top n items works based on visits. 

But I want the response to consider calculated Metric 1 ( a segment over an event)  and result Term 3 & Term 4. 

2. When I request top N items, the limit of results per page is pegged at 1000. Is there any way I can get top 10000 in 1 request instead of sending multiple requests with changing page (page =0,1,2 etc) in above request

Is there any way I could make this happen. Appreciate the responses.