I like to play 3v3, but with the mastery token, i kinda stopped and started doing 5v5. BUT NOW, riot as taken the mastery in 3v3 :D
You gain level and point like usual, and thats awesome. The only problem so far is with the mastery token for my level 7. I get S with my level 6 
but I don't get the token, is it a bug or just dumb thingy from riot? T-T
Zombiemaster2 votesNot a bug. You cannot earn mastery level 6/7 tokens on ARAM, TT, or any rotating game modes. You can only earn them on normal and ranked SR matches.
Champion mastery was brought to ARAM and TT, but you can only get to level 5 on them, no tokens.
Apeeling potato1 votesOkay, good to know, thx for the info :)
Nen Master B1 voteswhy cant we get mastery tokens in 3v3 it requires the same amount of skill as 5v5 to play good and get an S and we fight more in 3v3 so wouldnt that mean we know our champions better?