Arachne The Goat 10.1 Update

No offense meant, but I strongly suggest not to build like this. There are major issues with the build in general, and you're not utilizing Arachne's main functions well.

• Arachne's not the greatest with crit, due to her attack chain...not saying she can't do good damage with it, but typically Qin's Sais is a better build direction for her. When building crit, it's typically also better to get Deathbringer as one of the items, which is not standard and only suggested as an alternate to Shadowdrinker for some reason.
  
  
• She has healing in her kit. You might benefit from getting maybe 1 more lifesteal item situationally, but you've currently got Death's Embrace, Soul Eater, Serrated Edge, and Bloodforge in your kit. Any anti-heal is going to significantly counter all of those items to a decent degree.
  
  
• Embrace's passive triggers on basic attacks. That means you want your base AS to be pretty high. You've only got 1 AS item ( Demon Blade), which means you're not getting much out of Embrace.
  
  
• Speaking of starter item, Arachne is most commonly played in the Jungle, if we're talking Conquest. If not, you should identify which modes this build is for. Suggest going with Manikin Scepter, Eye Of The Jungle, or Bumba's Dagger as your standard starter, with the first 2 probably being suggested more than Bumba's. If you get Manikin, probably suggest selling it late.

You're best sticking with the tried and true build style for now. As a single-target god w/ no AOE abilities outside her ult, you'll find a lot of good early utility in Golden Blade, though you can consider selling that late-game for a different item.

With her attack chain, she gets a lot out of Qin's Sais. As a single target god, you can pair it well with The Ferocious Executioner as your main pen item. If you decide later in the build that you also want Serrated Edge, that's probably okay.

Where possible, go for more AS items, and again, probably not crit. Ata might be an interesting late-game item for her after getting a god kill to go after another, and Dom is another thing you can consider for anti-tank purposes.

Build order would likely look something like: Eye Of The Jungle (upgrade as preferred) -> Golden Blade -> Qin's Sais -> The Executioner -> Dominance -> Atalanta's Bow -> Sell GB get Silverbranch Bow or Serrated Edge or Bloodforge.