With its requirements met (Str 13 · Dex 11), Hefty Scimitar reaches 394 attack rating at +25; the strongest affinity at those stats is Hefty Magic Scimitar at 580.
Standard affinity at max upgrade, each weapon at its own requirements. A full bar is the class's strongest (Magma Wyrm's Scalesword, 650).
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-handed15can't be parried
Move
MV
Damage
Stance
Stamina
1st hit
R1 1Slash
100
394
10.2
15
0.57 s
R1 2Slash
102
402
10.2
15
0.57 s
R1 3Slash
104
409
10.2
15
0.57 s
R1 4Slash
110
433
11
15
0.67 s
R2Slash
125
492
11
25
—
Charged R2Slash
160
630
33
35
1.47 s
R2 2Slash
125
492
11
27
—
Charged R2 2Slash · 2 hits
75 + 115
748
33
38
1.53 s
Running R1Slash
105
413
10.2
18
0.60 s
Running R2Slash
120
473
11
25
0.67 s
Rolling R1Slash
92
362
10.2
18
0.50 s
Backstep R1Slash
92
362
10.2
18
0.57 s
Jumping R1Slash
107
421
10.2
18
0.57 s
Jumping R2Slash
127
500
22
25
0.70 s
Guard counterSlash
130
512
33
20
0.83 s
Two-handed15can't be parried
Move
MV
Damage
Stance
Stamina
1st hit
R1 1Slash
103
432
13.2
18
0.57 s
R1 2Slash
105
440
13.2
18
0.57 s
R1 3Slash
107
449
13.2
18
0.57 s
R1 4Slash
115
482
14.3
18
0.67 s
R2Slash
128
537
12.1
30
—
Charged R2Slash
165
692
36.3
40
1.47 s
R2 2Slash
128
537
12.1
30
—
Charged R2 2Slash · 2 hits
80 + 117
827
36.3
43
1.53 s
Running R1Slash
110
461
13.2
21
0.60 s
Running R2Slash
125
524
12.1
28
0.73 s
Rolling R1Slash
97
407
13.2
22
0.50 s
Backstep R1Slash
97
407
13.2
22
0.60 s
Jumping R1Slash
112
470
13.2
22
0.57 s
Jumping R2Slash
132
554
22
28
0.67 s
Guard counterSlash
135
566
33
25
0.83 s
Criticals2
Move
MV
Damage
Stance
Stamina
1st hit
BackstabSlash · 2 hits
55 + 176
910
0
20
0.53 s
RiposteSlash · 2 hits
55 + 220
1,084
0
20
0.83 s
Skill: Spinning Slash2move names inferred
Move
MV
Damage
Stance
Stamina
1st hit
SkillSlash
105
413
12.7
20
0.87 s
Skill follow-upSlash · 2 hits
60 + 110
670
16.8
35
0.37 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
152
152
—
+1
161
161
Smithing Stone [1] × 2
+2
170
170
Smithing Stone [1] × 4
+3
179
179
Smithing Stone [1] × 6
+4
189
189
Smithing Stone [2] × 2
+5
198
198
Smithing Stone [2] × 4
+6
208
208
Smithing Stone [2] × 6
+7
217
217
Smithing Stone [3] × 2
+8
226
226
Smithing Stone [3] × 4
+9
236
236
Smithing Stone [3] × 6
+10
246
246
Smithing Stone [4] × 2
+11
255
255
Smithing Stone [4] × 4
+12
265
265
Smithing Stone [4] × 6
+13
274
274
Smithing Stone [5] × 2
+14
284
284
Smithing Stone [5] × 4
+15
294
294
Smithing Stone [5] × 6
+16
304
304
Smithing Stone [6] × 2
+17
314
314
Smithing Stone [6] × 4
+18
323
323
Smithing Stone [6] × 6
+19
333
333
Smithing Stone [7] × 2
+20
343
343
Smithing Stone [7] × 4
+21
353
353
Smithing Stone [7] × 6
+22
363
363
Smithing Stone [8] × 2
+23
373
373
Smithing Stone [8] × 4
+24
384
384
Smithing Stone [8] × 6
+25
394
394
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.