There are a couple of weapons I am interested in MC teaching Lou Gao (Lou Gao was one of the divine craftsmen during Tang San's era) like Triggers from World Triggers and Guns from Honakai Impact.
MC himself has weapons section for his students like Sacred Gears from DXD, Teigu from Akame ga Kill, Metal Vessel's from Magi ,Cursed Gears from Seraph of the End, Weapons from Fate series, Zanpakuto...etc.
You can give suggestions who gets what...
1) Chen Xin (Cursed Gear Asuramaru, used only at the start.)
2)Gu Rong ( Maybe Magi vessels or Sacred gears)
3)Du Gubo (Vritra, Prison Dragon DXD)
4) Bibidong ( Cursed gear)
5) Ming Shu and Chao Tianxiang(Not student, they are recruited)
6)Ning Rongrong (Unknown)
7) Zhuqing (Unknown)
8) Yu Tianxin ( Maybe Baal from Magi)
9) Zhao Wuji (Not student, Unknown)
10)Qian Renxue (Unknown)
11) Hu Leina(Unknown)
12)Feng Xiaotian( Focalor From Magi)