Tank (build)

Core Combat Skills

Front Row - Keeping focus off your teammates should be a tank's core priority.

Important Combat Skills

Durability - Greatly increases your ability to withstand hits and gives you a great boost to resists.

Avoidance - Greatly increases your ability to withstand hits and gives you a great boost to defense.

Health - Greatly increases your ability to soak punishment with more health.

Outnumbered - Makes you exceptionally resillient against multiple targets.

Readiness - Increases the amount of gear you can carry, important for that extra bit of equipment.

Situational Combat Skills

Damage - Who doesn't like more damage and threat?

Healing - For those crucial moments where you need to take matters into your own hands.

Rage - Greatly increased damage while tanking for great threat.

Reactive - Damage reflect.

Taunting Strikes - Taunts the enemy on your attacks. Marginally useful when some DPSers may outthreat you, but otherwise rare scenario.

Tar Baby - Delays the next attack of enemy mobs. Very useful for mobs with a large hit that you may require time to recover. (I.E sharpshooting primes)

Roll with It - Reduces the cooldown of your abilities when struck. Works well in conjunction with a big, long CD heal like Milk Chug. Or a lifesteal skill like Drain Vitae.

Vampiric - Steal health on attacks means more health.

Core Mutant Powers

Threatening Presence - Helps you to absorb damage from your friends in a big AoE and increases your aggro generation.

Juggernaut/Myriad Armor - Really solid toggle that boosts your defenses.

Any Hide power - Usefulness of Smooth hide is questionable, but all the other hides have an upgrade or two that helps you tank.