With its requirements met (Str 11 · Dex 16), Reed Great Katana reaches 450 attack rating at +25; the strongest affinities at those stats are Flame Art and Sacred at 660.
Standard affinity at max upgrade, each weapon at its own requirements. A full bar is the class's strongest (Rakshasa's Great Katana, 551).
Moveset from the game files
Damage with Standard +25 at the stats above, before the enemy's defense; two-handed moves include two-handing's Strength bonus. MV (motion value) is the hit's share of attack rating (100 = all of it).
One-handed15players can parry them
Move
MV
Damage
Stance
Stamina
1st hit
R1 1Slash
100
450
10.2
15
0.53 s
R1 2Slash
101
454
10.2
15
0.67 s
R1 3Pierce
102
459
10.2
15
0.63 s
R1 4Slash
110
495
11
15
0.80 s
R2Slash
125
562
11
25
—
Charged R2Slash
160
720
33
35
1.47 s
R2 2Slash
125
562
11
25
—
Charged R2 2Slash
160
720
33
35
1.50 s
Running R1Pierce
105
472
10.2
18
0.60 s
Running R2Slash
120
540
11
25
0.80 s
Rolling R1Pierce
90
405
10.2
12
0.53 s
Backstep R1Pierce
90
405
10.2
12
0.57 s
Jumping R1Slash
107
481
10.2
12
0.60 s
Jumping R2Slash
130
585
22
25
0.57 s
Guard counterSlash
125
562
33
25
0.70 s
Two-handed15players can parry them
Move
MV
Damage
Stance
Stamina
1st hit
R1 1Slash
103
475
13.2
18
0.57 s
R1 2Pierce
104
480
13.2
18
0.57 s
R1 3Slash
105
485
13.2
18
0.57 s
R1 4Slash
115
531
14.3
18
0.77 s
R2Slash
130
600
12.1
30
—
Charged R2Slash
165
762
36.3
40
1.47 s
R2 2Slash
130
600
12.1
30
—
Charged R2 2Slash
165
762
36.3
40
1.47 s
Running R1Pierce
110
508
13.2
22
0.53 s
Running R2Slash
125
577
12.1
30
0.70 s
Rolling R1Pierce
95
438
13.2
15
0.43 s
Backstep R1Pierce
95
438
13.2
15
0.57 s
Jumping R1Slash
110
508
13.2
15
0.53 s
Jumping R2Slash
135
623
24.2
30
0.57 s
Guard counterSlash
130
600
36.3
30
0.70 s
Criticals2
Move
MV
Damage
Stance
Stamina
1st hit
BackstabSlash · 2 hits
55 + 176
1,039
0
25
0.53 s
RiposteSlash · 2 hits
55 + 220
1,237
0
25
0.83 s
Skill: Overhead Stance2move names inferred
Move
MV
Damage
Stance
Stamina
1st hit
Skill → R1Slash
147*
661
11
20
0.40 s
Skill → R2Slash · 3 hits
87 + 97 + 103*
1,291
22
60
0.57 s
From the player's animation events, BehaviorParam_PC and AtkParam_Pc. First hit: seconds at normal speed from the start of the move's animation (uncharged R2s start from a released charge, so they show —). Criticals include the weapon's critical multiplier. * The elemental motion value differs from the physical one shown; the damage uses each.
By upgrade level (Standard)
Level
AR
Physical
Cost
+0
175
175
—
+1
185
185
Smithing Stone [1] × 2
+2
196
196
Smithing Stone [1] × 4
+3
206
206
Smithing Stone [1] × 6
+4
217
217
Smithing Stone [2] × 2
+5
228
228
Smithing Stone [2] × 4
+6
238
238
Smithing Stone [2] × 6
+7
249
249
Smithing Stone [3] × 2
+8
260
260
Smithing Stone [3] × 4
+9
271
271
Smithing Stone [3] × 6
+10
282
282
Smithing Stone [4] × 2
+11
293
293
Smithing Stone [4] × 4
+12
303
303
Smithing Stone [4] × 6
+13
314
314
Smithing Stone [5] × 2
+14
326
326
Smithing Stone [5] × 4
+15
337
337
Smithing Stone [5] × 6
+16
348
348
Smithing Stone [6] × 2
+17
359
359
Smithing Stone [6] × 4
+18
370
370
Smithing Stone [6] × 6
+19
381
381
Smithing Stone [7] × 2
+20
393
393
Smithing Stone [7] × 4
+21
404
404
Smithing Stone [7] × 6
+22
415
415
Smithing Stone [8] × 2
+23
427
427
Smithing Stone [8] × 4
+24
438
438
Smithing Stone [8] × 6
+25
450
450
Ancient Dragon Smithing Stone × 1
From +0 to +25: 12 Smithing Stone [1], 12 Smithing Stone [2], 12 Smithing Stone [3], 12 Smithing Stone [4], 12 Smithing Stone [5], 12 Smithing Stone [6], 12 Smithing Stone [7], 12 Smithing Stone [8], 1 Ancient Dragon Smithing Stone.