>>532810869
I'd cut Orthrus and the two Olivia. I was running two Olivias and she can enable some nice combos with Shadowcrypt and Mummy BUT she is pretty slow, can brick your hand and you're often playing her on a turn you'd ideally want to be finishing your games at, ie, if you're playing her and not finishing your games with her, you probably already lost anyway. I'd those cards with Apollo to make the sword and mirror matchups more favorable.
As for how you play the deck, well, it isn't particularly difficult. You want cards to play on curve so you mulligan for those. If you're going 2nd, you mulligan for Beryl. If you're going against sword, you mulligan for Apollo and Aragavy. In general, you want to maximize your board presence while going face as often as you can. While you often don't want to trade, sometimes you have to in order to deny your opponent favorable trades or to avoid outright dying, obviously. And lastly, playing aggro is often somewhat of a gamble and that's just how it is. Like, for example, if you have to chose between trading to avoid a possible enemy lethal and going face to have a possible lethal next turn, you chose the latter every single time.
Other than that, you can watch jap streamers playing the deck to see how they pilot it and maybe that can help if you're still struggling with it.
https://www.youtube.com/watch?v=ygEvw8fvvSc
