[{quoted}](name=The True Bard,realm=NA,application-id=3ErqAdtq,discussion-id=vdGxNPoA,comment-id=00030000,timestamp=2016-01-21T05:23:12.124+0000)
As for mastery, it doesn't matter what map you are on; each of the secondary maps emphasizes a skill. Treeline is about communication, map awareness, building a teamcomp with limited members, and small teamfights. Howling Abyss is constant teamfighting with the added part where you have to die strategically to get stronger without giving up too much. The Crystal Scar is all about skirmishes and rotations; capture points and protect them, be ready to haul ass over to the windmill to aid your Azir in that 3v1 so you don't lose the crucial point, but make sure to keep someone to protect the boneyard from conniving Shacos. Also, you improve your mechanics by playing a champ, no matter the map (with the exception of Morde dragon ghost).
Well, in terms of mastery, I can understand how my ability to play Darius in Dominion or TT does not translate to my ability to play him on Rift. Just because I can use a certain combination of items from Dom or TT, doesn't mean I am proficient with him in the MAIN game mode of League of Legends, which is what this is about. League is made entirely around its MAIN mode, much like every other MOBA (Save HotS, HotS is an interesting example). If I'm not "mastering" a champion in the way the game is balanced for, then I can understand why I don't earn mastery.
"Hi, I'm a level 5 mastery Darius!"
"Oh but I never play on summoners rift. So like, where's my
?"