What is Fiddlestick's and Nocturne's thoughts on the Shadow Isles and their champions?

I don't think we have any interaction, lore or VO wise, with these two characters and the Shadow Isles. I'd love to know what their thoughts are on those champions and each other.

Personally, I think Nocturne might actually despise them as he is something completely different while Fiddlesticks would be more open to them. Between Fiddlesticks and Nocturne, I think they may appreciate each other as both share similar goals.