The half-kneeling rope woodchop and reverse woodchop are two exercises that work your obliques in a “spine-friendly” manner. Give them a shot!
The Angles90 grips are great for pull-ups, but due to a lower starting position, additional loading with a chin/dip belt may cause the plates to rest on the floor in the bottom range. If that’s the case, use a weighted vest like the Xvest, which can hold up to 84 pounds.