Channel Energy Stacking?

[Glych]

I was just wondering how channel energy would work with a Hex Channeler/Witch Doctor Shaman with Life Spirit/Envoy of Balance.

Hex channeler gives you 1 pool of channel energy, with the option of increasing it by using up a hex slot. I'm assuming that the feat "Extra Hex" allows you to boost it faster. You can use it 3+cha times per day.

Witch Doctor gives you a channel positive energy pool which treats your cleric level as your shaman level -3 for 3+cha times per day.

The life spirit gives you channel positive energy with your shaman level being treated as your cleric level, but only 1+cha times per day.

Envoy of balance then advances your channels, and stacks with levels granting channel energy before it.

My question is, how do they each interact? Can the hex be taken to bolster another pool? Do feats such as improved channel apply to them all? Which one would envoy of balance raise? I've been trying to get a channel build to work before, and with bless equipment etc and the plethora of channels I'd have, I think this might be it.

Much appreciated :)

[Glych]

Any advice folks? :)

[GM Arkwright]

"If I have the channel energy ability from more than one class, do they stack?
No—unless an ability specifically says it stacks with similar abilities (such as an assassin's sneak attack), or adds in some way based on the character's total class levels (such as improved uncanny dodge), the abilities don't stack and you have to use them separately. Therefore, cleric channeling doesn't stack with paladin channeling, necromancer channeling, oracle of life channeling, and so on.
Source"