12 Resources share the relationship creator to Gage, Christos

Buffy the Vampire Slayer, story, Joss Whedon & Christos Gage ; script, Christos Gage ; pencils, Georges Jeanty ; inks, Karl Story, Andy Owens, Dexter Vines ; colors, Dan Jackson ; letters, Richard Starkings & Comicraft's Jimmy Betancourt ; cover and chapter break art, Stephanie Hans, Season 12
Spider-Man and the Fantastic Four, Christos Gage, writer ; Mario Alberti, artist ; Jared K. Fletcher, letterer
Avengers vs. X-Men, writer, Christos Gage ; pencilers, Tom Grummett (#29-31) & Timothy Green II (#32-33) ; inkers, Cory Hamscher (#29-31) & Jeff Huet (#32-33) ; colorist, Chris Sotomayor ; letterer, VC's Joe Caramagna
Astonishing X-Men, Christos Gage, writer (issues #38, 40, 42) ; Juan Bobillo, penciler ; Marcelo Sosa, inkers ; Chris Sotomayor, colorist ; VC's Joe Caramagna, letterer, Vol. 8
Buffy the Vampire Slayer, script, Christos Gage & Nicholas Brendon ; art, Megan Levens, Rebekah Isaacs, Season 10, volume 3
Incredibles 2, slow burn, script, Christos Gage ; art & cover, Jean-Claudio Vinci ; color art, Dan Jackson ; lettering, Richard Starkings & Comicraft's Jimmy Betancourt
Civil War II, writer, Christos Gage ; artist, Travel Foreman ; color artist, Rain Beredo ; letterer, VC's Joe Caramagna
The superior Spider-Man, Christos Gage, writer ; Lan Medina, Mike Hawthorne, pencilers ; Cam Smith, Wade Von Grawbadger, inkers ; Andy Troy with Erick Arciniega, Jordie Bellaire, colorists ; VC's Joe Caramagna, Travis Lanham, VC's Clayton Cowles, letterers, [2nd series, Vol. 2]
X-Men Legacy, writer, Christos Gage ; pencilers, David Baldeon (#260.1-263) & Rafa Sandoval (#264-265) ; inker, Jordi Tarragona ; colorists, Sonia Oback (#260.1-263) & Rachelle Rosenberg (#264-265) ; letterer, VC's Cory Petit, [Book 13]
Buffy the Vampire Slayer, script, chapters 1 & 2, Christos Gage ; script, chapters 3, 4 & 5, Christos Gage & Nicholas Brendon ; art, Rebekah Isaacs ; colors, Dan Jackson ; letters, Richard Starkings & Comicraft's Jimmy Betancourt, Season 10, volume 1
Buffy the Vampire Slayer, script, chapters 1, 3-5, Christos Gage ; script, chapter 2, Christos Gage & Nicholas Brendon ; pencils, chapter 1, Cliff Richards & Karl Moline ; inks, chapter 1, Andy Owens ; art, chapters 2-5, Rebekah Isaacs & Richard Corben (pages 60-62) ; colors, Dan Jackson & Beth Corben Reed with Richard Corben (pages 60-62) ; letters, Richard Starkings & Comicraft's Jimmy Betancourt, Season 10, volume 2
Buffy the Vampire Slayer, script, Christos Gage ; art (chapters 1-2, 5-6), Rebekah Isaacs ; pencils (chapter 3), Georges Jeanty ; inks (chapter 3), Dexter Vines ; art (chapter 4), Megan Levens ; colors, Dan Jackson ; letters, Richard Starkings & Comicraft's Jimmy Betancourt, Season 11, volume 2