Describing events which are connected as the links in a chain is not easy when the chain has no end - you can begin anywhere. (How easily our language accepts the end of a chain to mean the beginning of the chain.) The following is my preliminary and imaginative reconstruction of the chain (although based on too limited knowledge):

Hatinga Te Kohe probably means the rule of the sun is broken, i.e. it is the moon queen who has broken his rule. But the sun is already dead and buried in the earth, at Akahanga:

28
Akahanga Hatinga Te Kohe

Moon is taking command by acting at Hatinga Te Kohe, nobody will rule unless she does. At the end of glyph line Gb3 growth has reached to its limit (pau), but sun died already before that. Evidently it takes some time from the death of sun until the effects of his healthy rays have abated:

2

Moving backwards we will find the first signs of what will happen already at midsummer, with the downturn at Te Pei. From there his strength is declining.

 

28
Te Pei Te Pou

Indeed, some say sun vanished at the apex of midsummer - it is no longer the real sun who is shining in the sky. Te Pou is the last of the kuhane stations with a definite article, and presumably it means the soul of the sun has risen into the night sky to become the magnificent Te Pou. Sirius is probably not visible until Te Pou.

His earthly stand-in, the king of the island, rules from midsummer, as if he was the sun. Evidently he is not without success, because growth continues. Then he makes a fatal move, he drinks water at Hua Reva - and everybody understands he is just a mortal (otherwise he should have avoided the sweet water - which quenches fire). From that time he is doomed:

24

He is no longer an image of the sun, he is only a sack filled with fluid, like all of us.