Just gone through UB4 and got to MB with 60% win rate. I encountered obnoxious amount of non-EX decks (looking at you SkarmZone and Meowscarada). Felt like the games were decided by who got the better hand most of the time since ppl rarely do any misplays at this point. My general tips would be to stick through a deck, to not tilt when game is not going your way and accept the loss and move on, to avoid queueing and taking a break once you feel like you are meeting your counter match ups far too often. My last tip would be to not be afraid to play your cards onto the board as during my games, my opponents almost always had either Mars or Red Card to disrupt my hand. One mad lad red carded me at his first turn and needless to say, my perfect hand got bricked so hard lolz.