Killing Masquerain is not the point in the Mirror.. It's just a giant royal rumble. Whoever goes first has an enormous advantage, and because it's a mirror.. you want 2 trubbish on the bench ideally if 1 is active, or not.. it depends.. and with 2 trubbish to have exp share.. this deck doesn't run a lot of catcher so I'm sure they will whiff plenty of times.. but I would gladly have my Sigilyph in the active with float stone/eviolites to stall while Trubbish get energied up.. I think my list is probably the best it'll get, made it day 1, then tweaked it for a few weeks. There's not much else to prepare for or plan out.. it all just depends on the match. Mirror match is hilarious, no doubt. But only for 1 side most of the time.