Most of it is trash, but I highly recommend the Ethics questions of both COMBANK and COMQUEST if you have access to them. Obviously don't buy the whole qbank just for this, but they were so clutch. COMBANK had ~60 and COMQUEST had ~90 questions, so it can be done in a day. Easily gave me 10+ questions on test day. Weird terms like the Stark Law would appear. NBD if you want to just take the L on these questions, but a last minute glance led to good yield IMO. COMQUEST biostats questions were also simple enough to cram in one day and were representative of test day questions.
OMM can be learned in one day by watching onlinemeded on 1.5 or 2x. Skip COMBANK OMM questions for your own sanity. COMQUEST OMM was good enough to get a feel for test day questions. And remember to draw your spinal levels and chapman's points diagrams.
THE ABOVE ADVICE IS ONLY FOR COMLEX. None of it is relevant nor sufficient for USMLE.