Cannibalize for dummies

[Vaarsuvius]

Hello guys,

Can any seasoned shaman enlighten me on the mechanics of Canni Dancing please ?
I've read and applied the guide to Canni dance for some time now:

https://wiki.project1999.com/Guide_to_Canni_Dancing

I think I'm doing it right:

wait for sitting regen to kick in,
stand & cast Canni,
sit,
wait for sitting regen,
rince repeat

But after casting Cannibalize I often see my mana go up 8 points (and not about 20 points as it should according to the spell description),
then a couple seconds later while sitting my mana will go up 12-13 ish (1350 mana pool),
and then another second or two after that it will go up 12 ish pts again,

Am I missing something ?


Thanks in advance