Word of advice, everyone has their own play style and it should be common sense to most, however some tanks, rarely, are pretty decently geared depending on dungeon and unless the healer has a problem, or enmity is constantly lost should be called out. Specially if a team wipes. Gauge your tank however, some are total trolls and leave so be ready for some salty players out there. ALL TANKS SHOULD USE CD's, learning when is part of learning though most really, really lack common sense. Try to give tips if your a mentor just remember, you can't give advice if you don't have that job at a respectable level or maxed out.