1d10+10 rounds and minutes work for me as the two durations.
Hoping to have a bit more time for conversions for the rest of the year (boy, feels weird to type that!).
That's fine, I guess, but do you have a rationale not to use average 10 or 11 Wis & Cha?
Tell you what, I'll go for Wis 12, but I think I'd rather stick to a lower Cha, especially since the standard gossamer is Cha 1. How about Cha 4 or even Cha 2 (I'm sure you're trying to keep it even)? It is a giant space jellyfish after all.
LOL!
I vote Cha 4. (I want the "noble" to mean something!)![]()