Vorseals will make a big difference for your trusts surviving. Try and get all you can if you have enough silt to. Make sure to rezone if they wear off to reapply them. They last 1 or 2 hours depending on zone blessing.
Already said but Yoran-oran or Ygnas are good for resisting sleep and silence. A way to remove silence on trusts will help too. The silencega is dangerous, especially if you don't realize they are silenced.
Crit hits are superb for farming beads. Make sure Lilisette II is one of your trusts for Rousing samba and it will give her ~90% crit hit rate and increase yours. Your trust's actions count towards your evaluations.
Other trusts to consider depending on situation:
Selh'teus. His TP cure can heal you while silenced and will hit everyone around you.
Shikaree Z. Will do Ancient Circle.
Areuhat. If the dragon is dying fast her blood rage is useful to help you get capped beads.
Ninja is a great job for farming beads from dragons. If you are Su3 or higher the kendatsuba set is fantastic. High magic evasion for resisting sleep and high crit hit rate for evaluations. Innin for more crits from behind. If no one is doing an attack down WS you can use aisha: ichi as well. Mummu armor is also good for capping evaluations quickly if you don't want or can't use kenda .
If you use Divine waltz targeting one of your trust it will wake other people's trusts too.
Leveling up your trusts
https://www.bg-wiki.com/bg/Marjory, Gifts and Mog Garden monster rearing cheers will help too.
But ultimately the biggest thing will be a GEO. GEO debuffs make dragons so much easier to do.