So these numbers are the damage what pulled the mob from me after firing, the gambit (and if it has threat over time waited to expire) - the test was done with a captain (no increased aggro skills were used - so no: Grave Wound; Threatening shout; and no Shadows Lament).
I had the Trait: Terrible Visage, and the +130% Fist-Spear Gambit Threat up legacy while testing.
Exultation Of Battle:
~4.400 threat unit initially, and ~4.400 every 4s for 16s (Total ~22.000 Unit of Threat))
(5 Tests, following values i got: 19.853; 17.297; 24.987; 26.630; 21.351)
Spear of Virtue:
~9.000 threat unit
(5 Tests, following values i got: 9.551; 6.350; 9.895; 10.262; 9.679)
~5.400 threat unit
(3 Tests, following values i got: 4.036; 7.692; 4.658)
~5.400 threat unit
(3 Tests, following values i got: ~4.800; 4.727; 6.807)
The next skills are not affected by the legacy - the aggro of fist-shield line gambits is nearly equal of aggro of same length fist-spear gambits without the aggro enhancing legacies (all of these fist-shield gambits got 1 test only)
Surrety of Death:
6.902 threat unit
Brink of Victory:
2.406 threat unit
1.796 threat unit
War Cry seems to have same aggro as goad (but has less targets, and only frontal, also not have self heal, and evade bonus component, but proc potency)
The two new damage less aggro skill got normal testing again... (also using them not trigger auto attack).
These arent affected by legacy.
~4.500 threat unit
(3 Tests, following values i got: 4.146; 4.561; 5.098)
Call to Battle:
~2.000 threat unit immediately, and ~2.000 threat unit in every 4s for 16s (Total ~10.000 unit of threat)
(3 Tests, following values i got: 10.702; 12.062; 10.116)
-All warden threat over times are 16 sec long
-All warden threat over times stack with every other threat over time and with themselves
-From the test it seems that aggro skills can crit (or at least u can get very different values from same aggro skill)...
Later i will add threat leeches too, also if u have more ideas, or test from the aggro gambits above write a pm and i will add them to the current one.
Hope this helps!