Following same journey as with (which took 13 days) and (done in 21 days) by far the easiest & least stressful way to unlock brand new tech tree is not to play these vehicles at all but rather collect vehicle blueprint fragments from Daily Mission (I'd re-roll missions unless its reward was bonds or blueprint fragment) rewards.
In these past days I was getting about 2 fragments per day and since there are 6 vehicles in brand new British medium vehicles tech tree (Tier V to X) it took only 23 days.
necessary vehicle modules: 171050 Free XP
Daily Missions: 45 vehicle fragments (1 fragment: 0x; 2 fragments: 9x; 3 fragments: 6x; 5 fragments: 2x)
Tour of Duty: 5 vehicle fragments
Another advantage to this method is that it's significantly cheaper than alternate options…
- 'Free XP only' route would cost: 557300 + 171050 Free XP
- Universal/National blueprint research route would cost: 480 Universal blueprints + 162 British blueprints (+ 171050 Free XP)
