The cdr from Calling the Shots is still being shared between hunters, the only way this hunter gets Trueshot back within 25 seconds is including cdr from all the other Spotter’s Marks from the other 4 hunters. I labeled every event with the current count of marks and the cdr given on each aimed hit, it amounts to 108 seconds of cdr which is the only way the hunter “白早丶” casts Trueshot within 25 seconds.
https://www.warcraftlogs.com/reports/r4nZgw9BvVXL32Wa?fight=99&type=auras&source=408&translate=true&ability=288613
02:02.727 The Geargrinder is afflicted by Spotter's Mark from 白早丶(1 mark)
02:06.829 白早丶 gains Trueshot from 白早丶
02:06.831 The Geargrinder's Spotter's Mark is refreshed by 白早丶(1 mark)
02:06.919 The Geargrinder is afflicted by Spotter's Mark from 灬社会精英灬 (2 marks)
02:07.315 白早丶 Aimed Shot The Geargrinder *4511762* (2 marks) 6 sec cdr
02:07.334 白早丶's Spotter's Mark fades from The Geargrinder (1 mark)
02:07.475 The Geargrinder is afflicted by Spotter's Mark from Masquerade (2 marks)
02:08.084 灬社会精英灬's Spotter's Mark fades from The Geargrinder (1 mark)
02:08.129 The Geargrinder is afflicted by Spotter's Mark from 白早丶(2 marks)
02:08.299 The Geargrinder is afflicted by Spotter's Mark from 王左左丶(3 marks)
02:08.991 白早丶 Aimed Shot The Geargrinder *10009948* (3 marks) 9 sec cdr
02:09.006 白早丶's Spotter's Mark fades from The Geargrinder (2 marks)
02:09.490 Masquerade's Spotter's Mark fades from The Geargrinder (1 mark)
02:09.789 The Geargrinder is afflicted by Spotter's Mark from 白早丶(2 marks)
02:10.068 The Geargrinder is afflicted by Spotter's Mark from 欢乐地小胖子 (3 marks)
02:11.728 白早丶 Aimed Shot The Geargrinder *8499932* (3 marks) 9 sec cdr
02:11.744 白早丶's Spotter's Mark fades from The Geargrinder (2 marks)
02:12.042 王左左丶's Spotter's Mark fades from The Geargrinder (1 mark)
02:12.089 The Geargrinder is afflicted by Spotter's Mark from 灬社会精英灬 (2 marks)
02:12.500 The Geargrinder is afflicted by Spotter's Mark from 白早丶(3 marks)
02:12.520 The Geargrinder is afflicted by Spotter's Mark from Masquerade (4 marks)
02:13.310 白早丶 Aimed Shot The Geargrinder *9838136* (4 marks) 12 sec cdr
02:13.327 白早丶's Spotter's Mark fades from The Geargrinder (3 marks)
02:13.395 Masquerade's Spotter's Mark fades from The Geargrinder (2 marks)
02:13.638 灬社会精英灬's Spotter's Mark fades from The Geargrinder (1 mark)
02:14.002 欢乐地小胖子's Spotter's Mark fades from The Geargrinder (0 marks)
02:14.018 The Geargrinder is afflicted by Spotter's Mark from 灬社会精英灬 (1 mark)
02:14.097 The Geargrinder is afflicted by Spotter's Mark from 欢乐地小胖子 (2 marks)
02:14.114 The Geargrinder is afflicted by Spotter's Mark from 白早丶(3 marks)
02:14.201 The Geargrinder is afflicted by Spotter's Mark from Masquerade (4 marks)
02:14.790 白早丶 Aimed Shot The Geargrinder *9873890* 12 sec cdr
02:14.792 白早丶's Spotter's Mark fades from The Geargrinder (3 marks)
02:15.074 Masquerade's Spotter's Mark fades from The Geargrinder (2 marks)
02:15.439 灬社会精英灬's Spotter's Mark fades from The Geargrinder (1 mark)
02:15.741 The Geargrinder is afflicted by Spotter's Mark from 白早丶(2 marks)
02:15.893 The Geargrinder is afflicted by Spotter's Mark from Masquerade (3 marks)
02:15.970 欢乐地小胖子's Spotter's Mark fades from The Geargrinder (2 marks)
02:16.177 The Geargrinder is afflicted by Spotter's Mark from 欢乐地小胖子 (3 marks)
02:16.426 The Geargrinder is afflicted by Spotter's Mark from 王左左丶(4 marks)
02:16.473 白早丶 Aimed Shot The Geargrinder *9948105* (4 marks) 12 sec cdr
02:16.474 白早丶's Spotter's Mark fades from The Geargrinder (3 marks)
02:16.595 Masquerade's Spotter's Mark fades from The Geargrinder (2 marks)
02:18.019 白早丶 Aimed Shot The Geargrinder *6494393* (2 marks) 6 sec cdr
02:18.843 The Geargrinder is afflicted by Spotter's Mark from 白早丶(3 marks)
02:19.071 The Geargrinder is afflicted by Spotter's Mark from 灬社会精英灬 (4 marks)
02:19.632 白早丶 Aimed Shot The Geargrinder *9419473* (4 marks) 12 sec cdr
02:19.649 白早丶's Spotter's Mark fades from The Geargrinder (3 marks)
02:20.419 欢乐地小胖子's Spotter's Mark fades from The Geargrinder (2 marks)
02:20.568 灬社会精英灬's Spotter's Mark fades from The Geargrinder (1 mark)
02:20.941 The Geargrinder is afflicted by Spotter's Mark from 灬社会精英灬 (2 marks)
02:21.336 The Geargrinder is afflicted by Spotter's Mark from Masquerade (3 marks)
02:21.456 The Geargrinder is afflicted by Spotter's Mark from 白早丶 (4 marks)
02:21.959 The Geargrinder is afflicted by Spotter's Mark from 欢乐地小胖子 (5 marks)
02:21.995 王左左丶's Spotter's Mark fades from The Geargrinder (4 marks)
02:22.230 白早丶 Aimed Shot The Geargrinder 2517985 (4 marks) 12 sec cdr
02:22.251 白早丶's Spotter's Mark fades from The Geargrinder (3 marks)
02:22.377 灬社会精英灬's Spotter's Mark fades from The Geargrinder (2 marks)
02:22.784 Masquerade's Spotter's Mark fades from The Geargrinder (1 mark)
02:23.212 欢乐地小胖子's Spotter's Mark fades from The Geargrinder (0 marks)
02:23.525 The Geargrinder is afflicted by Spotter's Mark from 欢乐地小胖子 (1 mark)
02:23.739 白早丶 Aimed Shot The Geargrinder *6667671* (1 mark) 3 sec cdr
02:24.049 The Geargrinder is afflicted by Spotter's Mark from 灬社会精英灬 (2 marks)
02:25.101 欢乐地小胖子's Spotter's Mark fades from The Geargrinder (1 mark)
02:25.251 The Geargrinder is afflicted by Spotter's Mark from 白早丶(2 marks)
02:25.476 The Geargrinder is afflicted by Spotter's Mark from 欢乐地小胖子 (3 marks)
02:25.578 灬社会精英灬's Spotter's Mark fades from The Geargrinder (2 marks)
02:25.868 The Geargrinder is afflicted by Spotter's Mark from Masquerade (3 marks)
02:26.065 白早丶 Aimed Shot The Geargrinder *9620841* (3 marks) 9 sec cdr
02:26.083 白早丶's Spotter's Mark fades from The Geargrinder (2 marks)
02:26.791 Masquerade's Spotter's Mark fades from The Geargrinder (1 mark)
02:26.990 欢乐地小胖子's Spotter's Mark fades from The Geargrinder (0 marks)
02:27.593 白早丶 Aimed Shot The Geargrinder *6875394* (0 marks) 0 sec cdr
02:27.593 The Geargrinder is afflicted by Spotter's Mark from Masquerade (1 mark)
02:27.837 白早丶's Trueshot fades from 白早丶
02:28.316 The Geargrinder is afflicted by Spotter's Mark from 白早丶(2 marks)
02:28.486 Masquerade's Spotter's Mark fades from The Geargrinder (1 mark)
02:29.710 The Geargrinder is afflicted by Spotter's Mark from 灬社会精英灬 (2 marks)
02:30.391 白早丶 Aimed Shot The Geargrinder 2498725 (2 marks) 6 sec cdr
02:30.408 白早丶's Spotter's Mark fades from The Geargrinder (1 mark)
02:30.408 The Geargrinder is afflicted by Spotter's Mark from Masquerade (2 marks)
02:30.774 The Geargrinder is afflicted by Spotter's Mark from 白早丶(3 marks)
02:31.126 Masquerade's Spotter's Mark fades from The Geargrinder (2 marks)
02:32.395 白早丶 gains Trueshot from 白早丶(trueshot after 25.5 seconds)
Also the Spotter’s Marks from Ohn’ahran Winds does not seem to trigger correctly, at a rate of 25% of the primary Spotter’s Mark we shouldn’t expect numbers consistently as low as single digits across entire dungeons:
https://www.warcraftlogs.com/reports/xT2ryMPdC6VhQ9Ak?fight=14&type=auras&source=13&spells=debuffs&by=target&ability=1215057
https://www.warcraftlogs.com/reports/1PLGZrMNJxfv4yX9?fight=20&type=auras&source=7&spells=debuffs&by=target&ability=1215057