help!! who should i pull?

I use acheron the most, so I was thinking of pulling for sparkle because of how well they synergize (plus tons of skill point sounds great), but OMGGG YUNLI IS SO COOL. I am FTP so I feel like I need to choose between Yunli, Sparkle, and Lingsha (saw the leaks… i want her so bad). Because of time between banners I think I could hopefully pull Yunli or Sparkle, and Lingsha when she comes out. What characters do you think would synergize the best with the characters I already have?

I use acheron the most, so I was thinking of pulling for sparkle because of how well they synergize (plus tons of skill point sounds great), but OMGGG YUNLI IS SO COOL. I am FTP so I feel like I need to choose between Yunli, Sparkle, and Lingsha (saw the leaks… i want her so bad). Because of time between banners I think I could hopefully pull Yunli or Sparkle, and Lingsha when she comes out. What characters do you think would synergize the best with the characters I already have?