[DeathsSilkyMist]

Did a few more tests to hone in where the softcap is:

========================
223 AC Test, No Shield Secondary
========================

DV, Count
19, 340
22, 33
25, 36
28, 40
32, 40
35, 27
38, 38
42, 42
45, 41
48, 28
52, 31
55, 47
58, 37
62, 29
65, 28
68, 26
72, 40
75, 37
78, 46
82, 14

Total Damage = 39948

=======================
223 AC Test, Lodi Shield Secondary
=======================

DV, Count
19, 341
22, 32
25, 35
28, 36
32, 40
35, 26
38, 33
42, 33
45, 31
48, 37
52, 31
55, 39
58, 42
62, 44
65, 43
68, 38
72, 42
75, 35
78, 37
82, 5

Total Damage = 40312

=======================
235 AC Test, Lodi Shield Secondary
=======================
DV, Count
19, 366
22, 33
25, 36
28, 35
32, 40
35, 36
38, 34
42, 39
45, 27
48, 31
52, 35
55, 36
58, 23
62, 42
65, 47
68, 35
72, 35
75, 31
78, 30
82, 9

Total Damage = 38829

=======================
250 AC Test, Lodi Shield Secondary
=======================

DV, Count
19, 370
22, 53
25, 36
28, 43
32, 32
35, 25
38, 29
42, 24
45, 25
48, 39
52, 21
55, 31
58, 35
62, 24
65, 33
68, 44
72, 41
75, 40
78, 41
82, 14

Total Damage = 39056

======================
250 AC Test, No Shield Secondary
======================

DV, Count
19, 333
22, 25
25, 23
28, 39
32, 35
35, 36
38, 46
42, 54
45, 30
48, 22
52, 44
55, 44
58, 32
62, 40
65, 35
68, 39
72, 40
75, 38
78, 39
82, 6

Total Damage = 40581

We can see that the 223 AC tests show the same pattern that Bcbrown saw, where the shield parse matches the non-shield parse. This makes sense, as Bcbrown said he had 171 worn AC + 61 Spell AC = 232 AC. While we are still not sure exactly how spell AC works, this total value is in the ball park.

Once we get to 250 AC, the shield parse starts to become better than the non-shield parse. The 235 AC shield parse shows basically no difference compared to the 250 AC shield parse.

This means the softcap for Shamans (and probably Druids/Clerics as well) is between 223 AC and 235 AC.

I believe the softcap returns may be 0.17 for Shaman, which is the EQEMU value for low chain classes. This would be like Shaman and Ranger.

This is because in my 363 AC Tests, my no shield parse is 39K damage with 380 minimum hits.

The 250 AC test with a shield in this post is 39K and close to 380 minimum hits. 23 AC is Shield AC, so taking that out would give us 227 AC. 363 AC - 227 AC = ~136 softcapped AC * 0.17 = ~23 AC, which is roughly the same AC as my shield. This suggests that 136 softcapped AC gave me the equivalent of ~23 worn AC.