@ Staff of Artakha, as said in the poll topic, it’s only real relation to Artakha is that he made it. He was never seen wielding or using it, it’s not really any more relevant to him as a character than the Avohkii, Kanohi Nuva, or Axalara.
@ Color, that he at the very least has some form of a gray-green (sand green, olive green) in his color scheme should be enforced, but perhaps not much more besides that as. As said prior, there are of course other color options that may fit the gray-green description (faded green, light faded green, light green, medium green, dark army green, bright bluish green/teal, possibly lemon metallic or metallic green) however, they’re all pretty limit in their useability as they’re extremely limited (besides teal, which I personally don’t think fits the bill) in part selection, even more so than sand green or olive green which are limited to begin with even though they’ve been used in constraction pieces and are active colors.
@ Complexity, I agree, I don’t think it’s any issue when it comes to a titan build. As far as scale goes, Artakha is about 10 ft, which would be around the height of Brutaka in Inika-scale at 28-29 centimeters/ever so slightly less than a foot (if I did my math right), but this doesn’t need to enforced by any means.
@ the mask, just personal taste - while I don’t want to see Artakha be gold, I think it could be really neat to have the mask be gold while the rest of him isn’t, because it makes the mask stand out as legendary. Because afterall, the Ignika and Vahi were both gold + if Artakha is also gold (or the same color as the mask), the mask doesn’t end up looking like anything special (see: Tahu Uniter).