This article collects the current data on the HP thresholds at which each Epic Monster drops a chest.

The information is still under review and refinement, and some values may be adjusted as we continue to verify the data. Our goal is to have a complete and fully verified list covering all Epic Monsters as soon as possible.

Special thanks to Jon Snow, Cogi, for his help  collecting data.

Fenrir

(Info in 'fangs')

248, 246, 244, 242, 240, 238, 236, 234, 232, 230, 228, 226, 224, 222, 220, 218, 216, 214, 212, 210, 208, 206, 204, 202, 200, 198, 196, 194, 192, 190, 188, 186, 184, 182, 180, 178, 176, 174, 172, 170, 168, 166, 164, 162, 160, 158, 156, 154, 152, 150, 148, 146, 144, 142, 140, 138, 136, 134, 132, 130, 128, 126, 124, 122, 120, 118, 116, 114, 112, 110, 108, 106, 104, 102, 100, 98, 96, 94, 92, 90, 88, 86, 84, 82, 80, 78, 76, 74, 72, 70, 68, 66, 64, 62, 60, 58, 56, 54, 52, 50, 48, 46, 44, 42, 40, 38, 36, 34, 32, 30, 28, 26, 24, 22, 20, 18, 16, 14, 12, 10, 8, 6, 4, 2, 0 (Final chest)

Acronomancer

784,615,386 - 769,230,771 - 753,846,156 - 738,461,541 - 723,076,926 - 707,692,311 - 692,307,696 - 676,923,081 - 661,538,466 - 646,153,851 - 630,769,236 - 615,384,621 - 600,000,006 - 584,615,391 - 569,230,776 - 553,846,161 - 538,461,546 - 523,076,93 - 507,692,316 - 492,307,701 - 476,923,086 - 461,538,471 - 446,153,856 - 430,769,241 - 415,384,626 - 400,000,011 - 384,615,396 - 369,230,781 - 353,846,166 - 338,461,551 - 323,076,936 - 307,692,321 - 292,307,706 - 276,923,091 - 261,538,476 - 246,153,86 - 230,769,246 - 215,384,631 - 200,000,016 - 184,615,401 - 169,230,786 - 153,846,171 - 138,461,556 - 123,076,941 - 107,692,326 - 92,307,711 - 76,923,096 - 61,538,481 - 46,153,866 - 30,769,251 - 15,384,636

Bloomfang

​Chest 7: 44.142

​Chest 6: 39.285

​Chest 5: 31.428

​Chest 4: 23.571

​Chest 3: 15.714

​Chest 2: 7.857

​Chest 1: 0 (killshot)

Vineweaver

​Chest 10: 286.2M

​Chest 9: 254.4M

​Chest 8: 222.6M

​Chest 7: 190.8M

​Chest 6: 159.0M

​Chest 5: 127.2M

​Chest 4: 95.4M

​Chest 3: 63.6M

​Chest 2: 31.8M

​Chest 1: 0 (killshot)

Basilisk

(35 Chests - in millions)

728.6, 707.1, 685.7, 664.3, 642.9, 621.4, 600.0, 578.6, 557.1, 535.7, 514.3, 492.9, 471.4, 450.0, 428.6, 407.1, 385.7, 364.3, 342.9, 321.4, 300.0, 278.6, 257.1, 235.7, 214.3, 192.9, 171.4, 150.0, 128.6, 107.1, 85.7, 64.3, 42.9, 21.4

​Doomsday / Shuten Doji

(Note: Shuten Doji is the same as Doomsday)

​Chest 7: 42,857,143 (42.8M)

​Chest 6: 35,714,286 (35.7M)

​Chest 5: 28,571,429 (28.5M)

​Chest 4: 21,428,571 (21.4M)

​Chest 3: 14,285,714 (14.2M)

​Chest 2: 7,142,857 (7.1M)

​Chest 1: 0 (killshot)

Armageddon

Milestones where you get a one of the clan chest are every 21.43M points.
N   Essence of fire
1: 0
2: 21,4
3: 42,8
4: 64,2
5: 85,6
6: 107
7: 128,4
8: 149,8
9: 171,2
10: 192,6
11: 214
12: 235,4
13: 256,8
14: 278,2
15: 299,6
16: 321
17: 342,4
18: 363,8
19: 385,2
20: 406,6
21: 428
22: 449,4
23: 470,8
24: 492,2
25: 513,6
26: 535
27: 556,4
28: 577,8
29: 599,2
30: 620,6
31: 642
32: 663,4
33: 684,8
34: 706,2
35: 727,6

Doomsday

Starting HP: 50M 
Total Clan Chests: 7
7: 42.86M
6: 35.71M
5: 28.57M
4: 21.43M
3: 14.29M
2: 7.14M 
1: KILL

Arachne

Arachne's Swarm starts the encounter at 300M HP and drops 35 clan chest evenly across the kill, one roughly every 8.57M HP (300M % 35). The 35th chest drops on kill itself.
300.000
35: 291.429
34: 282.857
33: 274.286
32: 265.714
31: 257.143
30: 248.571
29: 240.000
28: 231.429
27: 222.857
26: 214.286
25: 205.714
24: 197.143
23: 188.571
22: 180.000
21: 171.429
20: 162.857
19: 154.286
18: 145.714
17: 137.143
16: 128.571
15: 120.000
14: 111.429
13: 102.857
12: 94.286
11: 85.714
10: 77.143
9: 68.571
8: 60.000
7: 51.429
6: 42.857
5: 34.286
4: 25.714
3: 17.143
2: 8.571
1: 0.000

Hellforge

0M
21,4M
42,9M
64,3M
85,7M
107,1M
128,6M

Shadow invasion

(13.5B, 70 Chests - in billions)

13.307, 13.114, 12.921, 12.728, 12.535, 12.342, 11.957, 11.764, 11.571, 11.378, 11.185, 10.992, 10.800, 10.607, 10.414, 10.221, 10.028, 9.835, 9.642, 9.450, 9.257, 9.064, 8.871, 8.678, 8.485, 8.292, 8.100, 7.907, 7.714, 7.521, 7.328, 7.135, 6.942, 6.750, 6.557, 6.364, 6.171, 5.978, 5.785, 5.592, 5.400, 5.207, 5.014, 4.821, 4.628, 4.435, 4.242, 4.050, 3.857, 3.664, 3.471, 3.278, 3.085, 2.892, 2.700, 2.507, 2.314, 2.121, 1.928, 1.735, 1.542, 1.350, 1.157, 0.964, 0.771, 0.578, 0.385, 0.192, Kill