The problem with self-res is that it allows people and teams to continue being bad. They won't learn anything from someone saving their arse all the time. If there's a defender running the first part of CE, the shield should only be used with damage reduction and Helm of Saint-14, and then only if the team is getting swamped at a light or at the bridge (and even then it's likely to hold the team back as they can't shoot out of it). Personally, I prefer running as a striker during that bit. FoH with aftermath is just perfect for it.