Just found out how to avoid losing any MMR...
This is probably how the wintraders are doing it these days.
So let's go;
Step 1: Queue up
Step 2: Queue pop's - Enter Arena
Step 3: Leave the Arena before the gates open up
Because you are leaving before the gate open's up, you are apparently not losing any MMR.
-But what can i use this for?
The answer is simple: Wintrading!
So for wintrading you need 2 Arena teams in the same bracket, may it be 2s, 3s or 5s doesn't matter.
A good idea would be to queue at some shitty times, such as in the weekdays at the middle of night, 3-6AM (Especially when your low at MMR)
So what we are doing now is (Team A = The team we want rating/high mmr on) (Team B = Boosting team):
Queue up against each other
Enter once it pops
Team B leave's after whole team has entered (Before the gates open)
Team A stay's in the arena, and enjoys the freewin
A good advise is to do it in sets of 5.
First let team A win 5 times in a row, then team B, and so on.
If you want a great score, so it doesn't screams out "WINTRADERS!" a good idea would be to boost 2 teams to 3K mmr.
Disband the team you wanna push for gladiator/rank1, and then form a new team.
Start wintrading up again, but without splitting the wins, and there you go, looks way more legit.
Also use common sense, do not do it with 3 palas, 3 dks, 3 warriors or so, that's just too obvious, and you don't want that kind of attention.
-Reason why we wanna do it this way is too maintain as equal MMR as possible. This means that we will be reaching an higher rating much faster when we are getting +20-30 each game, instead of +1-2.