A tank needs to see two things: who is attacking whom, and when the next big hit is coming.
Threat on nameplates
- Threat Plates colours each enemy by threat, so loose enemies stand out.
- Plater Nameplates does the same with more options, if you want to tune it.
Warnings
Deadly Boss Mods (DBM) or 
BigWigs Bossmods for boss timers in the nine new dungeons.
Bars
Bartender4 or Dominos: page your bar by stance (Warrior) or form (Druid) so tank buttons stay in the same place.
Per tank
- Protection Warrior: Shield Wall has its own 15-minute cooldown now.
- Protection Paladin: Judgement taunts from 10 yards with Seal of Fury.
- Feral Druid: potions work in Bear Form.
Every dungeon with level range: dungeons.