Douluo: Martial Soul Luo San Pao, Fooling the Master from the Start

Xiao Xian transmigrated to the Douluo Continent and awakened the same waste martial soul as Master Yu Xiaogang, 'Luo San Pao', with innate soul power at half a level.

What's the correct way to use an external beast-type martial soul?

Cultivating diligently only to be stuck at level 29?

Since it has intelligence, why not let the martial soul cultivate itself!

"Tang San, good junior brother, I'll be taking your Profound Heaven Skill."

"Teacher, your Golden Iron Triangle belongs to me!"

"Xiao Wu, thank you for your soul rings and soul bones!"

"Tang Hao, your wife's soul bone is really useful."

(Not slandering the Master or Tang San, but also not mindlessly blackening them. The focus is on tricking and utilizing them.)