A very funny way to cheese it is to load your cohort up with Gamma Pistols AND with Skitarii Rangers Lv3. The latter always crit, and crits ignore any and all armor. And if you're lucky enough when approaching Neftusk's chamber, you'll start with enough cognition to deploy those rangers from the get-go. With clever application of a Secutor to boost the damage and add some extra attacks, I managed to wipe out Neftusk in, like, two turns, without ever touching the pillars.
A very funny way to cheese it is to load your cohort up with Gamma Pistols AND with Skitarii Rangers Lv3. The latter always crit, and crits ignore any and all armor. And if you're lucky enough when approaching Neftusk's chamber, you'll start with enough cognition to deploy those rangers from the get-go. With clever application of a Secutor to boost the damage and add some extra attacks, I managed to wipe out Neftusk in, like, two turns, without ever touching the pillars.
solar lances + the canticle that lets you ignore armor can get similar results
Just pull out yor Gamma Pistols and laugh as they go through his shields....2 rounds and he is dead.