what is once per turn...
six samurai is currently known to be a FTK deck looping red and blue for infinite counter and then either FTKing or decking out your oppenent under the mulcharmy.
the deck has 12-14 cards as non engine, and an in engine ways to break boards. the extra deck is flexible with with own 5 mandatory monster the rest is how even you want to play or tool boxed to your local.
I am particularly a fan of the infernoble package doesnt seem like a lot especially when it has a in engine spell and trap negate, however the end board is usually the new Shi En, as your monster negate, soft once per turn. Charles for a spell and trap negate and a pop, equiped with angelic ring which is a spell negate on resolution (say no to droplet, dark ruler and super poly), and a dweller or I:P to go into S:P.
the craziest thing is the lingering effect for the new tuner monsters if you go for simpler boards, the monk lowers the level of all monster your oppenent summon by 1, explaining this to tenpai player confused them (this is not a activated effect), and the trainer effect means your monster are not easily walked over.
it does have it weakness, droll, d-barrier and any removal negate (psy-frame, orange light and judgement)
i leave the side deck for you to tailor to your needs, i suggest enishi and maybe extra copys of cunning and the new six strike quick play they add an difficult board state, since the both synchro shien are soft per turn, you can tag them out using cunning and summon the out again another negate, enishi summoned with six strike drops a book of moon and compulse.
you dont have to play FTK!!!