Articulated Fly Material

[BSF]

Any one out there tying big articulated flies? If so, do you stick close to the recipes for Circus Peanuts, Peanut Envy, and S. Dungeons. What materials have you found work best for the patterns mentioned, or patterns you tie, and why do you like that material?
Example:
Body: Crystal Chenille, Cactus Chenille, Estaz, or other?
Hackle: Schlappen, Bugger Hackle, or other?
Hook: Type, and Size?

Thanks
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