Finally, after months of my first attempts and a lot of planning by my own, I have done Ironman Rookie Solo in less than 23 minutes (and world record).
After figuring out possible RNG's for every mission, I came up with strats for The SCRS and Black Dusk, the sum of both making a difference of 1 minute and 10 seconds which I do not have at the endscreen (23:13 22:38 = 35) due to lag at the moment of teleporting between missions.
2.41.21
0.39.17
1.12.46
3.02.14
3.38.23
0.50.00
2.34.20
3.21.19
Time Without Loads (the sum of all of the mission times): 17.59.40 (1.52 minutes better than the previous world record).

0:00 The Blacksite
3:10 The Financier
4:17 The Deposit
6:05 The Lakehouse
9:51 The Withdrawal
14:06 The Scientist
15:33 The SCRS
18:50 Black Dusk
23:08 Endscreen