Easier and likely faster than Gelly's parkour route. back of the envelope style timing makes me think that the any% route for East 1 will be:
1: Set up green laser for 2 and steal a cube
2: Use laser from 1 to skip first move
3: Intended
4: Intended
Bridge Skip, activate tower
5: run back to capsule, get checkpoint, and drop in from above as seen here: • Talos Principle 2: E1-5 Through the Door (... .