It would seem that at my spell power level the classic 51/10/5 warden spec is not performing up to par any more. It's overshadowed by 51/10/5 cabalist
At a glance
51 Inq/10 sent/5 cab- 2056 SP. Armor of Awakening+Inq. crystal+corporal punishment
*Vex- 735 crit 387 noncrit
*Bolt of Judgment- 2337 crit, 1227 noncrit
*Sanction Heretic: 7747
*Bolt of Depravity: 4674;
51 Inq/10sent/5warden- 1977 SP., same buffs
*Vex- 751, 395 noncrit
*Bolt of judgment- 2259, 1186
*Sanction Heretic: 7901
*Bolt of Depravity: 4516;
Cab spec gains ~3.5% damage on bolt of judgment
Cab spec gains ~3.5% damage on bolt of depravity
Inq. spec gains ~2% on Sanction Heretic
Inq. spec gains ~2.15% on Vex
Did not test nysyr's rebuke, but the cabalist spec would see an increase in effectiveness. The very large numbers, as seen in Sanction Heretic and Bolt of Depravity, combine assumed crits for the initial hit and ticks.
It's worth seeing a relevant breakdown of the top cleric's sicaron parse
33% Bolt of Judgment
26.7% Sanction Heretic
17.8% Bolt of Depravity
5.7% Nysyr's Rebuke
Another guild cleric confirmed this spec to be an increase on the dummy with the same buffs.
Edit: this can be explained by two primary factors. Sanction Heretic and Vex already have huge modifiers, so the 10% from warden winds up contributing much less than a multiplicative 10% would. Also, your spellpower amount may contribute to Warden being worse at lower levels. However, I did not test this spec at the lower SP levels. I will do so later for a comparison.