The best way to do this is just skip this banner. R6 banner won't come ever again, where this banner could have a rerun.
More detailed explanation: Saga will definitely be spooking you in other banner even if you don't pull right now, just like Surtr/Thorns. Dusk, like Nian is another niche AoE caster/summoner operator which role can be substituted by Beanstalk. Her S3 has too high of DP cost to be usable in normal situations. Even if all of those R6 operators performs best against stun-able enemies, which some bosses are immune to, they're True Limited.
