I think you are trying to hard to be fair. The only Higlandercard in the deck is Zephrys. Aside from some odd tempo plays vs murlocs, or a suprise boardwipe every 20 games os so, you are better playing a more centered list with tools you need for specific things.
It could be tempo, or theif, or pirate, or whatever. Play a normal game, gain a tempo advantage, whilch is what Rogue does best (at least temporary tempo advantage) and then throw Myra's Unstable element if you think you have a good enough position to snowball the game. I am willing to bet you won't even need him most times, but he can still come in handy if your opponent pulls something out of his ^^^ DECK at the last moment.