So if you scout with obs at 4:15-4:20 and see 1-1-1 with 2 rax being added, you can use this build. As soon as you see a third CC coming down, you can start transitioning. Basically keep making units until you see the third cc. Once you see the third CC you can transition into Colo + gasses + 4th. Take note that if they are going 3-1-1, the earliest they'll get stim is at 6:40, so they won't attack any earlier than that.
12 | 0:00 | | |
13 | 0:12 | | |
14 | 0:17 | | |
14 | 0:24 | | |
15 | 0:36 | | |
15 | 0:37 | | |
15 | 0:42 | | |
16 | 0:48 | | |
17 | 0:55 | | |
18 | 1:03 | | |
19 | 1:15 | | |
20 | 1:24 | | |
20 | 1:27 | | |
21 | 1:36 | | |
21 | 1:40 | | |
21 | 1:48 | | |
21 | 1:50 | | |
22 | 1:59 | | |
23 | 2:03 | | |
26 | 2:26 | | |
27 | 2:36 | | |
32 | 2:55 | | |
35 | 3:17 | | |
36 | 3:22 | | |
39 | 3:29 | | |
39 | 3:31 | | |
42 | 3:51 | | |
47 | 4:07 | | |
49 | 4:14 | | |
49 | 4:21 | | |
55 | 4:30 | | |
58 | 4:45 | | |
62 | 5:00 | | |
62 | 5:09 | | |
62 | 5:10 | | |
62 | 5:18 | | |
66 | 5:31 | | |
68 | 5:37 | | |
68 | 5:41 | | |
72 | 5:43 | | |
77 | 6:03 | | |
80 | 6:05 | | |
85 | 6:28 | | |
101 | 6:50 | |