GCD differences

DRK: SE combo, Bloodspiller, StalS combo, Quietus
4 Unique ST keys, 3 Unique AoE keys

PLD: RA combo, Goring combo, Atonement, Holy Spirit, Confetiteor, Prom Combo, Holy Circle
7 Unique ST keys, 4 Unique AoE keys (Confetiteor appears in both ST and AoE)

WAR: Path Combo, Eye Combo, Fell Cleave/Inner Chaos, Mythril Combo, Decimate/Chaotic Cyclone
5 Unique ST keys, 3 Unique AoE keys

GNB: SB Combo, GF Combo, Sonic Break, Burst Strike, DS Combo, Fated Circle
8 Unique ST keys, 3 Unique AoE keys


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oGCD differences
Per minute

DRK: 4x Edge/4x Flood, 1 Ad, 1 CNS, 2 Plunge, 1 BW
9 keystrokes, 5/6 Unique keys
Potency: (550*4) + 220 + 495 + (220*2)
Total: 3355

PLD: 2x SW, 2x Cos, 2x Inter, 1x Fof 1x Requis
8 keystrokes, 5 Unique keys
Potency: (370+462.5) + (295+368.75) + (250*2) + 550
Total: 2,546.25

WAR: ~3x Inf, 2x UH, ~1 Ons
~6 keystrokes, 2 Unique keys, 1 Situational key
Potency: (~1375*~3) + (495*2)
Total: 5115

GNB: 6x Cont, 2x BF, 1x BwS, 2xRD , 1x NM
11 keystrokes, 5 Unique keys
Potency: (840+1008) + (800+960) + 780 + (240*2)
Potency: 4868

Additional 90/2Min buttons
DRK: LS, DE, SE
3 Unique keys, 1.83 keystrokes per min
Potency: 2800 + (330*5) + 330
Total Average per minute: 1400 + 1100 + 220
2720

PLD:

WAR: IR, Ons
1 Unique key, 0.33 keystrokes per min
Potency: ~4840 + 220
Total Average per minute: 3,226.66 + 146.66
3372.66 (Cannot crit or direct hit)

GNB: BF
Potency: ~360
1 Unique key, 0.33 keystrokes per min
Total Average per minute:
240

Additonal defensives used for optimal offensive play
DRK: 1 TBN every minute
PLD:
WAR: Venegance every 2 minutes
GNB:


Total potency gained ontop of GCD via oGCD attacks (and for whatever reason buff oGCDs) per minute average

DRK: 6075 (Blood gain from BW not calculated)
PLD: 2,546.25
WAR: 8,487.66 (7497.66 pot that cannot Crit or Dhit and 7,277.66 of which is Inner Chaos/Fell Cleave)
GNB: 5,108

DRK: 12 keys, 10.83 oGCD CPM
PLD: 12 keys, 8 oGCD CPM
WAR: ~9 keys, ~7.33 oGCD CPM
GNB: 14 keys, 11.33 oGCD CPM

TLDR: If you're gonna take a dump on DRK; maybe play the class first.