I would recommend not running GS unless you’re against a boss where ranged is effective (Jade Maw, bad groups on final Chaos, Trident for Jellyfish, etc). Sword/sword + /focus will be your core, typically, although if you want that extra dps, /torch is better than /focus.
Swap the GM for Power Block since you can AoE interrupt with Sword4, Focus4, or switch it to Mental Anguish for bonus shatter damage if and when you shatter (rarely).
Dueling should be 1/3/1, there’s basically no flexibility here.
As for utility skills, Signet of Illusions isn’t necessary in PvE unless you’re trying to solo something too difficult that ends up one shotting your illusions (note illusions don’t typically get one shot in PvE, because they aren’t the focus target).
I’d recommend: Signet of Domination if you’re comfortable and can hold it for dps boost, otherwise Decoy or Defender are decent. Disenchanter can be useful in certain scenarios, as well, but I wouldn’t slot it because I’d rather do and forget.
Signet of Inspiration is also kind of useless on this build, because you’re not generating any useful boon to share. See the above recommendations, but if you’re 100% confident in your ability to stay alive (note: in T4s, good luck), run Signet of Midnight. If you need a Signet to activate for Distortion, it will be this one and it doubles as a stunbreak. Try not to use Signet of Dom.
The edited build
Also carry a focus. Focus4 paired with Power Block is just free dps on a skill you should be using on trash.
Lastly: If you end up soloing Chaos final boss, Staff is better than GS if survivability is your objective. Don’t ask why I know this.
