Threat conversation

[Jothay]

Tested against the rancor world boss on tatooine with a Juggernaut that is Half Columi/Half Rakata:

Full Immortal spec did about 1250 Threat per Second (real numbers)
Immortal/Vengeance did about 1350 Threat per Second (real numbers)

Yes, there is a threat difference, but not as much a you might think and you are losing Survivability and Mitigation by going into Hybrid.

Also, the taunt threat mechanic appears to be:

You need 130% of another person's threat to pull target off them. In addition to the taunt forcing the target to attack you for 6 seconds, you are automatically brought to this 130% mark. So...

#1 Threat is Sorcerer DPS at 10k
#2 Threat is Main Tank at 9k

Tank Taunts

#1 Threat is Main Tank at 13k (10k * 130%)
#2 Threat is Sorcerer DPS at 9k + 1 GCD worth

Tank Taunts again (uses AoE taunt)

#1 Threat is Main Tank at 16.9k (13k * 130%)
#2 Threat is Sorcerer DPS at 9k + 2 GCD worth

If you mix in Off Tank Taunts, you only further increase the 130% barriers.

There is an additional mechanic that says anyone standing right under the boss, only needs 110% threat to pull. Melee DPS that outgear the tank, could break this 110% quite easily.

What can you draw from this?
1) Unless there is a reason to save it (such as a threat dump) use taunts every time they are off cooldown
2) Initial MT threat can go a lot higher if in the first few GCDs of a fight you have the raid do 5 seconds damage, then OT taunt twice, then the MT taunt twice
3) Melee DPS should be at the edge of a boss's hitbox at minimum, never closer
4) MT should in front of the boss, but not directly under him

Also, there is no threat decay other than threat dumping bosses.