Buffed Heimdall is bugged and it makes him 5/5 defender
According to abilities description, Heimdall should pause his buffs and personals if a CHAMPION places poison or incinerate. However, for now it works for recoil masteries as well. So, if you see him on nullify immune node (like 35), you probably not gonna have a good time against him. It also makes him unkillable on attack. This should be fixed ASAP, because for now it can break so many places: AW, both coliseums, almost every peace of content, where is no nullify or stagger.