Here’s another basic Mahjong strategy known as Kabe, plus Dama-ten and Saki-giri which you can use against slightly tougher opponents.
Yo, this is UmaiKeiki again. If you are reading this, it means I actually made more of my defense guide (a surprise, I know). This is a continuation of my previous post which you should probably read first. I apologize if this turns into another novel/tl;dr/wall of text/whatever.