Probably just a string of bad luck with the RNG.
Solo with only Might I've seen:
White crits for 1900ish
CS crits for 2200ish
DS crits for 2000ish
Judgement crits for 3500ish (Martyr)
HoW for 3500ish
They are all pretty close but they have different uses. Obviously DS critting for 2k is nice...especially if it's against 3+ mobs at once. Judgement critting for 3500 could be bad in some cases since it's alot of self inflicted damage to take at once. CS is just a bread and butter, spam it when it's up, type spell similar to Heroic/Mortal Strike or Sinister strike or Stormstrike. HoW is just...well it's just fun to throw a boot at someone for 3k+ damage