Considering that Heath barely came off the field last year for a top 10 defense I would consider him better than Nolan Carroll or Deonte Thompson. I've been bitching about his tackling for years so upgrading his spot is definitely a priority, but I also think you can get by with him as a starter without having your entire defense compromised, which isn't something I can say for Carroll. Iloka on the other hand was Minnesota's 4th safety behind Anthony Harris and could barely get on the field despite Sendejo missing almost the entire season.