Questions regarding cultist mechanisms

Hey Guys, I have a couple of questions regarding how Cultists and their corresponding Old ones work: Are the +% cultist spawn Rate stacked and saved when consumed by Mr. Iron? Or is this Stat Lost? Unfortunately this stat doesn't show up... Is there any benefit from kling cultists besides the trophys and the eldritch items? E.g. that possibly an old one is spawning instead of Vir? Does the +cultist % spawn Rate increase the total Rate of spawning cultists to 70% or is it hard Capped at 50%? Do cultists which spawn in the Bonus round count to the total Killed cultists of the corresponding old one? Or is the counter stopped as soon you Hit bonus round? Which armor Type do the cultists use? Is it zod or just as the regular rounds armors (vex/ber/fal)? And is it possibly to view? It seems that cultists have sometimes the same abilitys as regular waves, but are more crowdy with n+3 vs the regular wave... Looking forward for your anders...