The key to doing it fast is swap letters
- it counts as a move just like 'pass' but can be done infinitely whereas passing can be done only three consecutive times before the match ends.
What I did was using two devices
with two accounts. I created a game between those two accounts and shuffled letters each round on each account. Each shuffle takes about 5-10 seconds * 2 profiles = 10-20 seconds per move. This is approximately 3 moves per minute, so around 180 moves per hour.Edit:
As oO KwaX Oo
pointed out - it can be done even faster by swapping on one profile and passing on the other. Thanks for the helpful advice!