hi, my elbows get sensitive too. genetic luck of the draw, and we drew the short stick! gotta experiment with what doesn't bother them. for me, tricep press-downs with a rope are fine, and dips never hurt. almost anything else bugs 'em.
get ready for 10 million people telling you to do any direct arm work, btw, that's it's a waste of time. i would take that with a grain of salt.