Well to be honest there are 2 foci I never use... Cold and Fire
With breath of big bynn rnk3 I get 1.5k Crits out of it (still not fully AA'd or even focused) I betting when I get it all done around 1.8k a tick average... Compared to the other Disease DoT's its a major improvement.
But on the average I never load them unless soloing. Cold I use every level cap increase to max my evocation skill... If they gave us a Sting of the Queen type Cold spell like the Bstld's have then it'd come back into a valuable Foci
As to foci that are worthless. Fire is the only one I'd say we don't ever use... think lvl 5 was last fire spell.. don't know with the new spell lvl system (well new since DoN,DoD or so)
and WaringMcMarrin has the totally worthless ones listed. We have one chromatic spell line but it's a proc (Panther, Puma) Adds a Chromatic proc to those meleeing.
I'd love to see us get a true chromatic/corruption spell line...
I do agree on Reagent conservation as totally worthless... If you want it you can get the aug from FC1. 130hp/mana Reagent Cons IV or something like that. But let the Enchanter/Clr get them first if you value your Guildmates. Since we've got no new spells to use it with and frankly I'd rather not have reagents ... I prefer just making potions as a good shaman should
Think Summoning Efficiency would still work (I use my dog but it's not a valued effect)
If improved block increased our chance to use Shield Block AA it'd be useful... But I'm 98% sure it only works on the block skill.
---Fero, Furious Bash, Parry/Improved parry, Reanimation(undead pets only),Prismatic,Chromatic, Corruption are all at this point
worthless.