John Ely is the boss of string gauges:
https://www.hawaiiansteel.com/graphics/ ... _chart.pdf
I used his chart for my 21" E13... came out great, I went for the heavy end of course, being so short. You're on the long end, so I'd go for the thin end-ish:
G .010
E .014
C .017
A .021
G .024w
E .030w
C .036w
A .042w
The Scotty's set is several steps heavier:
Gauges: .015, .018, .022P, .024SL, .030SL, .036SL, .042SL, .054SL
They don't list the notes, but ACEGACEG is pretty standard I'd think.
John Pearce is a little lighter on top where I'd be worried about a 15 on high G:
011 014 018 024w 030w 036w 046w 056w.
GHS completely copies Scotty's. Asher (Electro-Hawaiian) offers these gauges:
.015P .017P .020P .024P .028W .036W .048W .068W
... for these three separate tunings!
asher c6.png
That .015 is being asked to spread a full fourth! Warranted though, I guess.
As you can tell it's a wild wild world out there, choose judiciously.
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Too much junk to list... always getting more.