I have read too many cultivation novels where people have reincarnated into other bodies that were deemed trash. I don't mind this but I hate how they blame their new prowess on a mythical master which got really annoying. Like the title says want the mc to have a strong master who has the strength to defend him/her against powerful enemies.
Battle Through the Heavens will edit more if I find (now kinda confused did you mean defend mc like realy long time only or to some point like 1 lvl higher if the later then that quite common) Monster Paradise
From what I see they want a real master to exist and be there in existence. Not like sovereign of the 3 realms where mc is faking a master
Seconding My Disciple Died Yet Again... should also read My Master Disconnected Yet Again, in this one MC is the OP master.