This is build order used by Beastyqt in one of his guide videos. I made it from replay because Beasty didn't provide build order. Tell me if I missed something!
Good luck and to the SALT mines!
| 12 | 0:01 |    | |
| 13 | 0:13 |    | |
| 14 | 0:16 |    | |
| 14 | 0:25 |    | |
| 15 | 0:38 |    | |
| 15 | 0:39 |    | |
| 16 | 0:44 |    | |
| 16 | 0:50 |    | |
| 17 | 1:02 |    | |
| 18 | 1:14 |    | |
| 19 | 1:28 |    | |
| 20 | 1:42 |    | |
| 20 | 1:50 |    | |
| 20 | 1:53 |    | |
| 21 | 2:00 |    | |
| 22 | 2:05 |    | |
| 23 | 2:13 |    | |
| 23 | 2:17 |    | |
| 23 | 2:18 |    | |
| 23 | 2:22 |    | |
| 24 | 2:30 |    | |
| 25 | 2:37 |    | |
| 25 | 2:42 |    | |
| 26 | 3:02 |    | |
| 26 | 3:05 |    | |
| 27 | 3:12 |    | |
| 31 | 3:14 |    | |
| 32 | 3:26 |    | |
| 33 | 3:32 |    | |
| 33 | 3:34 |    | |
| 38 | 3:39 |    | |
| 38 | 3:44 |    | |
| 38 | 3:45 |    | |
| 38 | 3:47 |    | |
| 41 | 3:48 |    | |
| 41 | 3:51 |    | |
| 41 | 3:55 |    | |
| 46 | 4:06 |    | |
| 46 | 4:07 |    | |
| 48 | 4:18 |    | |
| 48 | 4:19 |    | |
| 53 | 4:30 |    | |
| 55 | 4:31 |    | |
| 55 | 4:39 |    | |
| 55 | 4:42 |    | |
| 62 | 4:52 |    | |
| 63 | 5:00 |    | |
| 63 | 5:01 |    | |
| 63 | 5:02 |    | |
| 69 | 5:07 |    | |
| 69 | 5:09 |    | |
| 69 | 5:14 |    | |
| 69 | 5:19 |    | |
| 71 | 5:24 |    | |
| 71 | 5:27 |    | |
| 75 | 5:36 |    | |
| 75 | 5:39 |    | |
| 76 | 5:47 |    | |
| 76 | 5:48 |    | |
| 88 | 6:00 |    | |
| 88 | 6:02 |    | |
| 88 | 6:09 |    | |
| 88 | 6:10 |    | |
| 85 | 6:17 |    | |
| 83 | 6:20 |    | |
| 83 | 6:21 |    | |
| 78 | 6:28 |    | |
| 78 | 6:29 |    | |
| 78 | 6:34 |    | |
| 78 | 6:36 |    | |
| 82 | 6:43 |    | |
| 82 | 6:45 |    | |
| 83 | 6:48 |    | |
| 83 | 6:50 |    | |
| 84 | 6:55 |    | |
| 84 | 6:57 |    | |
| 86 | 7:02 |    | |
| 86 | 7:10 |    | |
| 86 | 7:13 |    | |
| 86 | 7:14 |    | |
| 90 | 7:18 |    | |
| 90 | 7:20 |    | |
| 90 | 7:21 |    | |
| 93 | 7:27 |    | |
| 93 | 7:29 |    | |
| 95 | 7:33 |    | |
| 95 | 7:35 |    | |
| 97 | 7:38 |    | |
| 97 | 7:39 |    | |
| 97 | 7:42 |    | |
| 104 | 7:45 |    | |
| 104 | 7:50 |    | |
| 105 | 7:52 |    | |
| 115 | 8:06 |    | |
| 115 | 8:11 |    | |
| 113 | 8:16 |    | |
| 113 | 8:18 |    | |
| 108 | 8:21 |    | |
| 108 | 8:26 |    | |
| 120 | 8:32 |    | |
| 126 | 8:39 |    | |
| 132 | 8:42 |    | |
| 132 | 8:43 |    | |
| 136 | 8:49 |    | |
| 136 | 8:54 |    | |
| 130 | 9:03 |    | |
| 130 | 9:06 |    | |
| 130 | 9:08 |    | |
| 130 | 9:09 |    | |
| 139 | 9:10 |    | |
| 139 | 9:13 |    | |
| 139 | 9:18 |    | |
| 139 | 9:21 |    | |
| 141 | 9:26 |    | |
| 148 | 9:34 |    | |
| 146 | 9:44 |    | |
| 142 | 9:45 |    | |
| 142 | 9:56 |    | |
| 142 | 9:57 |    | |
| 155 | 10:04 |    | |
| 155 | 10:05 |    | |
| 156 | 10:11 |    | |
| 160 | 10:18 |    | |
| 158 | 10:23 |    | |
| 162 | 10:28 |    | |
| 162 | 10:31 |    | |
| 170 | 10:39 |    | |
| 166 | 10:46 |    | |
| 162 | 10:52 |    | |
| 164 | 10:57 |    | |
| 164 | 11:00 |    | |
| 175 | 11:07 |    | |
| 175 | 11:09 |    | |
| 175 | 11:21 |    | |
| 155 | 11:29 |    | 

I hope this build order helps. Beasty attacked earlier because he was certain in his victory _(he inflicted huge amounts of damage with first 2 BCs and hellions)_.
For more detailed analysis and further info, I highly encourage you to watch his video https://youtu.be/jSs2Oy6P5Ao.