I think he does know that? IIRC, his main complaint about SSR Baal was the 90 second duration on that skill.
But that's mitigated by Baal's cooldown reset skill. IIRC, the idea is to fire the debuff first->reset cooldown->when 90 seconds are up, cast debuff again for another 90 seconds->at least 8 turns should've passed within 180 seconds so you can reset cooldowns again->cast debuff a third time for another 90 seconds. You should be able to string together close to 270 seconds of that debuff in the worst case scenario. And 270 seconds ought to be enough time in fights that get resolved in under 20+ turns. Which as noted by you guys earlier should be the normal situation.