I see a lot of guides that are disregarding Holy Prism as a plausible Retribution ability, however I have found it to be incredible for a multitude of reasons.
First of all, the low CD. Sure it means it's another button to press more often, but for a ret DPS it is normal to have a spare GCD every now and then and that is filled nicely with this ability.
Second, the damage of the ability is higher than Execution Sentence for single target, as long as it is used every cooldown. For me, HP deals 27-30k per hit with a 20 second CD (so approximately 81-90k per minute). ES deals 67k over time for a 1 minute CD. Lights Hammer deals 59k-63k per minute single target
Third, the healing that it provides when cast on an enemy is quite ridiculous. I've seen it crit tanks and melee for 75k+ (with damage modifiers), and it really can save mana for the healers in times of heavy (and light) damage output. It's useful solo for a quick little 25k heal. ES can't do this, you have to choose if you want to output damage, or provide a little HoT to help the healer out, and you have to make this choice over a 1 minute CD.
Forth, with a simple little macro:
That macro provides the ret pally with the ability to AoE up to 5 targets in 15 yds for 18-20k each every 20 seconds (so if it hits 5 mobs: average 57k per minute * 5 mobs = ~250k) something that ES also can't do since it has no AoE ability.Code:#showtooltip Holy Prism /cast [target=player] Holy Prism
This macro isn't even necessary (I find it useful for my playstyle). If you want, you can click the tank and use it on them to radiate an AoE at the beginning of combat so you don't have to run in and use the ability.
I was performing some tests on dummies and found that between Holy Prism and Execution Sentence, HP beats ES every time.
A quick test of Lights Hammer gives me the same damage numbers (single target) as Execution Sentence. LH does heal a bit more than HP however.
- HP against 4 targets deals ~78k every 20 seconds (~234k per minute), LH against 4 targets dealt 244k -300k per minute. (Note: Crits are not being factored in and are inevitably happening during my testing, my crit rate is exactly 10% and went unmodified in combat)
- Execution Sentence will ALWAYS do the amount listed on the tooltip (for me, that's 67,291) unless it's modified by Inq/AW. Try it yourself. The damage that is dealt is 55% small hits, 45% big hit (the big hit for me is 30k)
- Avenging Wrath will only increase the damage done by 1 Holy Prism attack out of a possible 9 (AW CD is 3 minutes, HP can be used 9 times in that time), whereas AW will boost the full duration of 1 ES or LH out of 3 uses (once again, AW CD is 3 minutes, ES & LH can be used 3 times in that time).
- The above point changes with 4pc T14 which makes the CD on AW 1m45s (105s), adjust the numbers accordingly
All of this has been tested on my level 90 Paladin with no buffs, full gear and on the 4 testing dummies in the Pandaland city hub (please note, the gear is not fully optimised either (so don't bother criticising me about that, I already know) and I am hit and EXP capped.)
The TL;DR version:
Holy Prism is the best talent to use for single target, Lights Hammer is better for 2 or more targets. Execution Sentence is a healing ability.