Justice v Justice or why Willbender virtues need reduced "attacks to trigger" by default.
Scepter 1, Orb of Wrath has a 1/2 second cast time. If we ignore projectile travel time due to being in melee range, a Guardian, Dragonhunter, and Firebrand can land 120 hits over the course of one minute. This triggers the Justice passive 24 times.
Willbender must activate Justice which applies 1 burn, and has 6 seconds for hits. With Scepter 1, 12 hits can land for 2 triggers of the "passive". Rushing Justice also has a 12 second cooldown. Over one minute, Rushing Justice can be activated 5 times. Which is really only 4 times since the fifth would be available at the one minute mark where this "test window" ends. So 4 uses of Rushing Justice with 2 triggers and the initial burn each. Resulting in 12 total burn for Willbender vs 24 for every other version of Guardian. I'm unsure if charges hold over between casts but if so, that's still only 8 more hit during Justice and 1 additional proc. This comparison doesn't take into account any traits, gear or other attacks/skills used. A auto-attack vs auto-attack comparison means Willbenders virtues are half as powerful as every other version. Good trade off.
Additional, if we take Permeating Wrath in to consideration. The numbers shift to Willbender at 20 and everything else at 40. So still half as much and PW Willbender is still worse than everything else without PW.