User blog comment:B214/High School DxD EX/@comment-68.53.129.54-20170413035039/@comment-30924344-20170414023916

Ravel said Issei's schedule will be busy just for the next 200 years. That's 2 centuries. I think near the end, everything will be sorted out to where Issei can leave things to his trusted subordinates do multiple minimal tasks for him while Issei does the most important, giving I'd say plenty of time after the 200 years is over to his wives; mulitple gathered together in different locations. So he will see all his Devil wives in the Underworld, his angels wives in Heaven and so forth.