Temple raiding for Sizhui it is. He'll definitely be helping remove the sarcophagus lid, and also keep away the stray harpies and soothing any lingering energy as much as he can.

(He'll also be writing to the relatives/descendants and trying to track down those who are altogether missing because he is conscientious like that.)

I'm down for Sizhui either helping put the bones to rest or transferring spiritual energy for healing to Wei Wuxian, Xie Lian, Shen Qingqiu those who touch the live wire. Since he's on the spot, etc.