Actually, 2 Chanters is fine as long as you don't have them using the same phrases at the same time. A little overlap won't hurt either.
I will use 2 mid-level chanters as an example. I will use an plus sign (+) for the main Phrase and a Equal sign for the Linger effect (=), and the semicolon will indicate the chanter starts over ( . Each use of the + and = signs will be 1 second of the chant.
We will keep Thick Grew their tongues on the enemies constantly. Chanter 1 will speak Thick Grew their tongues, at the sight of their comrades, and then Dull the edge, and go back to sight of their comrades. Chanter 2 will use Lo their Endless Host, and then Thick Grew their tongues, and move to . The numbers signify the phrase being used:
1) Thick Grew their tongues
2) at the sight of their comrades
3) Dull the Edge
4) Lo their Endless host
1) ++++== ++++==
3) ++++== :
4) ++++++=== ++++++===
1) ++++== :
There is a 2 second gap at the end where we have an overlap from the last linger of Thick Grew their Tongues. I copied the effects of Thick grew their tongues.
1) ++++== ++++==
1) ++++== : < both Chants reset at the same time. So, they will not go out of sync.
With 2 Chanters we can have the enemies nearly constantly Frightened (1 second where that debuff wears off), and constantly at -10 Concentration.
Of course you could also have 1 Chanter Debuff enemies (tank) as a melee, and another Chanter buff the party (DPS) as a mid-ranged gunner/archer. Chanters have 5 phrases each spell level, and only get access to 3 at the most with level 1. I just looked at my level 12 Chanter and you only get 2 level 2 and 2 level 3 phrases. Since there are five each level you could have 2 Chanters doing some wonderful buffs/debuffs, and hardly ever overlap while having only a few gaps where the enemy isn't debuffed or the party isn't buffed.
Heck, the only level where you could double up on a phrase is level 1, and I would probably pick Come, Come Soft winds of Death for that. So, if you wanted to constantly do a little AoE damage you could.
Anyway, to the OP: Talent picks will depend on what you want. Ancient memory and Beloved Spirits are about to get their Endurance healing halved from the looks of things from the patch notes. They weren't great before, and soon they will be worse.
If you want to be a tank then I would suggest defensive talents: Weapon and Shield Style, Superior Defense, Cautious Attack, Hold the Line, etc. You will max (or close to max) Perception and Resolve, and you will want good Intellect for bigger AoE's on Invocations and Chants, and it will increase duration times on your Invocations as well. If you want to help more offensively then having Interrupting Blows talent + Thick Grew their Tongues (phrase) may be fun. You won't hit often, but with your high perception combined with the aforementioned talent and phrase you will interrupt a lot. High Lore will give you the ability to cast scrolls for fun. I would get enemy attention, use CC (with another character), and cast Fan of Flames from a scroll as an opener in a lot of situations. Tank being at the front made it incredibly easy to land.
I picked mostly debuffs for my tank Chanter because I could ensure most enemies would be debuffed, but didn't always have my ranged close enough for the buffs. So, I would recommend Debuffing enemies if you are melee. Invocations I picked were Stuns, Debuffs, some damage. I rarely used the damage when I could kill the enemies DR or stun them. I didn't use summons, but they are useful. So, if you like summons then by all means.
For a ranged build then pick talents for that, and then Phrases and invocations that seem reasonable.
You could make a non-tank melee using reach weapons (pikes ect), or a Dual Wielding Chanter. They would work a lot like the tank spec with different talents ofcourse. You would also have to be patient and let enemies settle onto the tanks. Because without Resolve, Perception, Weapon and Shield, and tank talents... you will get hit and it will hurt.
My one issue with the Chanter, after finishing the game with mine, is that they only have 2 Class specific talents. Ancient Memory and Beloved Spirits. Beloved Spirits just improves Ancient Memory, and they are both passive. The class doesn't do much outside of auto-attack. You can cast Invocations when you get enough Chants up, but it doesn't happen often. However, they really do win battles. A Chanter with 5 Chants up is a terrifying thing. Anyway, I wish Obsidian would give us some active abilities to use. Wizards, Priests, and Druids all get active abilities to help conserve spells, but chanters get nothing to do. The only exception is when you switch chants, cast from scrolls (expensive to do), and invocations.
EDIT: I don't know if Ancient Memory Stacks with multiple chanters. I don't believe it is a buff. I think it would, but I could be wrong.
Edited by Ganrich, 02 April 2015 - 06:17 PM.