Current South Island League is marginal due to Otago/southern clubs finances.
In Canterbury, “Ru$$ia FC” (CHCH Utd) would be in but they’re not even in the top Mainland Premier League. Not likely there would be many other takers. So not really best of the best.
The only other contender might be Cashmere Technical, but not sure how finances would go, along with a focus on a Chatham Cup run.