Xie Lian can volunteer to put his hands in the live wire surrounding the bones, given that he is indeed alive, albeit for a long time, and also this will no kill him and he will laugh off the damage outwardly (but probably still go to wen Qing for the ouchies because she told him to.)

For the rest, he's here to punch ghosts if needed and also protect unsuspecting people from them with his handy-dandy silk ribbon