[Chojin]

a lot of those are isolation exercises that target specific muscles within the core. the spinae erector is pretty goddamn important and very few lifts target it (deadlift is one of them btw). the only bodyweight exercise that comes to mind for it is the superman, which is pretty much impossible to add weight to. i recently added leg raises to my routine because i needed more hip flexor work and would like to correct some of my hyperlordosis. i prefer to use the cable machines for it.

obliques i never really saw a point in targetting due to the way those muscles can square out your midsection.