Getting and holding 5 pops is more of a problem than killing the nm. If you don't have apoc yet, farming the pops and getting the right one to drop might be problematic with 2 people as well.
Not sure if you just after the attestation or actually doing the 90 Apoc version trial.
If you doing just for attestation, I've solo'd it as BST before but time was close to 15 min. If for 90 trial, getting 5 of the pops can be annoying even with a THF. But yes, I've duo'd just fine for the 90 Apoc trial.