First things first, let's look at the composition of the melee dps group, to which i guess we both agreed.
Melee DPS group: Fury Warrior + Enhancement Shaman + Feral Druid + Rogue + ...
the 5th spot, is what we argued about, so i will make comparisons between a Retribution Paladin and:
- Hunter (survival)
- MS Warrior
- Rogue
Altho, having a second rogue for this spot is the safest choice, by FAR. Not even arguable, not situational, he will do his DPS disregarding every other variable...
Let's start with the rogues!
They have significantly higher DPS (highest dps class) and they don't have a threat problem (aggro dump). No matter how long the fight is, they are not limited by mana, and their DPS is constant from the start of the fight till its end.
The same can be said for Hunters, in addition they have uninterruptable damage regardless of the boss cleaving or aoeing which melee have to watch for, they have a great aggro dump, altho their effectiveness without the need of another misdirection drops a lot and their dps is lower than rogues. But they do provide ~300 AP buff if geared like Leica for example who has 1100 agility and 52% crit raid buffed, which keeps their AP buff constant. The Aspect of the Viper buff helps them a lot in long fights and that's an issue solved for this class, which we will encounter fighting Illidan for example, approximately 20-30 minutes... which is our aim as a raiding community, we are not an Illidan farming guild, and we have to optimize our raid composition in order to achieve that goal.
MS Warrior (33-28-0), higher DPS than the Paladin, altho he mainly auto-swings like a pally, the pally's SoC is compensated by the warrior's instant attacks. He has Flurry, he gives 4% Physical Damage buff to the whole raid which outweighs crit or ap buffs for scalability reasons. Even Death and Taxes and a few other guilds use MS Warriors for this buff, example: Schmity from D&T. Again, he is not limited by mana, altho he might be limited by aggro (just like the paladin). So, long duration fights won't affect this class/spec. Again, having a second warrior in that group allows for a second Shout buff (Commanding / Battle) and he can help keep sunders/demo shout/thunder clap up on the boss.
Now for Retribution Paladins:
A Retribution Pally gives an extra blessing to the raid (which is not needed coz we already have 2 pally healers and 1 or 2 pally tanks).
He gives 3% crit to the whole raid from his judgement and 2% dmg to his party, in addition he can refresh all the judgements that are on the target.
3% crit scales significantly bad compared to 4% raw physical dmg (MS Warrior) or a constant ap buff (Survival Hunter), since any physical dps class is near 30-40% crit, and crit is capped in relation to your hit, for example: Attack Table
Please do check the Attack Table and see how insignificant crit is when our raid is easily achieving the 30-40% crit which is the point where only Haste/Armor Penetration/Attack Power/Hit/Expertise (Recently) have a HUGE impact on our DPS.
Then comes the mana limit... If a Ret Pally is put in the Melee DPS group, even if he is chain chugging mana pots his dps is very very limited in time to the point of auto-swinging with SoC Rank 1. Being oom makes him less reliable to even keep the judgements up, it also means that his DPS suffers a lot after the first few minutes of the fight, not to mention that his DPS is already average considering theorycrafting which is very situational.
Threat Dump??? anyone??? By the way the 30% less threat buff for Paladins only makes them on par with rogues who have the base threat of 70% and warriors who have 80% base in battle and berzerker stance, without any talents. Not to mention Hunters who have the shortest cooldown on aggro dump ability.
So to sum it up, here's my conclusion:
The Retribution Paladin is unreliable to keep his buff/dps up during medium to long fights. This being said, it will be better for the raid to get any of the above mentioned classes in the melee dps group instead of a ret pally, since their sustained dps output will be much higher and their Buffs will be more reliable and much more effective.
So basically, and logically speaking, the choice of the 5th dpser would be a rogue or a MS warrior, if there was no need for another Misdirection. Let alone bringing in another really high dps class like a warlock or a mage or even the mana battery shadow priests.
If i was the GM of Nihilium, or any top guild, farming Illidan, a ret pally in those raids is only reserved for a HIGHLY dedicated/appreciated/valued/regarded member of the guild (do not get me more, my point here is, if Argrax for example had an extremely well geared retribution paladin and we are farming available content, he can be taken into such raids, for fun), more like a privilege and luxury, since such guilds can allow this sort of luxuries in their raids.
WALL OF TEXT CRITS YOU FOR OVER 9000!!!!!!!!!!!!!!!!!!!!!!
You have been Insoed.
Questions welcomed.
Peace.
PS: Everyone should have a look at the Attack Table, if you're not already familiar with this.