Arena weight versus bst

I don't really know how much a unit's bst matters in arena, but I read an article that claimed that an extra 10 bst is and extra 1 point in arena (before bonus units). The other part of her weight comes from the amount of sp that all of her skills are worth. Also, it's worth noting that, according to the article, if you have a focus unit and play an advanced game, your default minimum score (assuming the match is deathless) is 600, so your Nowi definitely is not weighted at 177