Best Vorpal Blade I've done was a 3.4k, realistic averages are 1.2k-2k range.
My A. Fury averages 1.6-2k range.
My Raging Rush averages around 2.5k.
My Evisceration which comes out almost every 30 seconds on DNC averages 1k-1.5k(lols imo compared to real DD DNCs) THF friend (mine is still lols) usually around 2k+.
My Blade: Jin averages around 1.5k-2.2k.
My Leaden Salutes run 1.5k to 2k+ depending on buffs.
Heck my lolSAM at 80 averaged 1k-1.4k Jinpu/Gekko (which was lols compared to my friend's SAM at the time).
So, what you are saying is PLD WS damage is on par or slightly less that the "heavy DDs" and that isn't good enough. Well, ok, I guess to each their own, but I don't know how anyone is going to really compare to a maxed out DRG or WAR, but last I checked, DRG wasn't getting invites either despite having perhaps the best Crit WS around in Drakesbane, so that is certainly not why PLD isn't being invited. Wars get invited because they have a bunch of red !!, and blue !!, and hey, PLD has only slightly less than WAR.
Heck forget the WS damage every job I play and gear to a decent rate can match(usually go above and beyond) the damage per hit.
The problem is my other jobs either A) Swing a lot faster or B) Hit for a lot more damage. Worse in the case of MNK it does both.
Well, you are right and wrong on this one. First, the big hitter, WAR damage / per delay is almost exactly on par with pld with a slight edge to WAR (I am excluding Empyreans). Wars can use hasso 10% delay redux, pld can do /nin for 25% or dnc for 15% dw, and I will get to that for tanking a bit farther down, cause really on most NMs, if your pld is trying to tank, you shouldn't be using shield. THF/DNC/NIN, yeah, they attack blazing fast, but you have much higher base damage than my thf @ 43, at least 25.6% higher damage if you are using a shamshir, thf and pld get the same tier DW due to /nin or /dnc sub, so I would say they are break even in terms of benefit. MNK, well, no one can really compete with a job with both dealy redux (Martial Arts) and damage tied to H2H skill, they are probably one of the single most broken jobs in the game right now.
PLD has good gear, PLD has a decent WS, PLD should have good Atma options. The thing is DDs have in some cases on par options in other cases better options. When a DD takes a beating similar to that of a nonOchain PLD and will get a mob killed faster meaning less damage taken over time the question really is "Why PLD tank?"
A fully geared pld DD that is actually taking damage is taking at least 19% less damage than any other job that is gearing for DD. Creed Cuirass +2 and Creed Cuisses +2 should guarantee that. Not to mention random procs of Occasionally Nullifies Physical Damage on the AF3 +2, if you are meleeing with 4/5 AF3 +2. If you are trying to DD tank with pld, that is what you should be using, if you can get a Zelus Tiara and a Goading Belt, you have 25% haste and 19% physical damage reduction in your TP set. If you are DDing to tank, you shouldn't be using shield (Unless you have an Ochain), which means you CAN take advantage of delay reduction from /nin and /dnc.