In about 85-90% of pistol rounds I get near insta double head dinked at any/all ranges regardless of what pistol my opponents are using. Seems unlikely, especially considering 99% of players I run into are just spam clicking the primary fir...

If my headshot percentage is fairly bad (12%), would it be worth using the phantom more than the vandal considering I’m not fully taking advantage of the one shot capability of the vandal?

Rope shooting should be nerfed. It's too accurate. Also, straffe plus forward/backward, plus look up/down, should make movement on vertical ropes be faster (like csgo ladders). Also, you should be able to drop down & press F & silently...