One missed by adam before was the foxsports.com power ranking.
It currently has the rangers ranked #8. Although, I have noticed they only gradually update team by team which doesn't always shift other teams.
Texas has toiled against the toughest schedule in the game this season, but the fade seems to be starting. Adam Eaton could be back in late July, but keeping the patchwork rotation together until then will be a serious challenge.
The only place I could find anything about opponents record or strength of schedule was on espn.com's standings page, and the "relative power index" page.
It shows that the rangers have faced the most difficult schedule.
Suck on that Angels fans who seemed to think the rangers had it easier earlier this season.