ADCS & Delegation attacks on AD set

Hello,

I noticed from looking at the TJ null and Lain 's list some machines from HTB like Certified and Escape,and that has to do with certificate attacks , which if i remember was mentioned in the course material but not discussed as an attack vector , neither seen in the labs .

One more machine that had some kind of kerborsting attack like Flight in AD, i know that kerborsting was discussed in the course but i felt this machine used some kind of advanced delegation attack ??

I feel that Flight is related to OSCP but machines that rely on certifiacte attacks might be out of scope ? or since it's mentioned in the course even if briefly this means i should study it as well ?

I