When using the Entrada Rag (Bright), for example, is it recommended to use the ICC profile in PS's color space/working space (Edit > Color Settings > Working Spaces > RGB) as well as using the ICC profile when printing?

Or is Adobe's 1998 RGB profile (as the most common example) wide enough (color gamut) to suffice?

Mike, this is an excellent question. The working color space is different than the output ICC profile that we provide for our papers. You will always want to work in a large color space, like Adobe RGB 1998, and then use an output profile when printing (like all of our MOAB paper profiles).

I hope this helps-

Andy

Thanks Andy!