i agree with interrupt..too often left to the personal taste and not assigned any order..
and juggernaut can also leap on the healer to reduce incoming damage and lowering threat
Actually I think it's better to leave interrupt order to personal taste unless it's a fight which doesn't allow that (like HM golden fury). Why? If you have predefined order, it takes only 1 person to forget about interrupting and it causes a problem. If there is no order, people can reasonably cover for each other.