Hawke wrote:If you dropped AM to 6, you can get all those feats you need like Prodigy and Able Learner. Well if you want them.
You can get Spell Power I and II for that +1 Epic caster DC, and perhaps Mastery of Shaping since you mentioned liking your summons. For example in the Troll Claw Fjord, your summons can kill the trolls and you just finish them off with a Fireball or something without harming your summon. Same principle would work with people you team up with. Altough, Energy Immunity fire would do the same thing to an extent.
Now, I do not know if Mastery of Shaping also works with AoE 'cloud' spells that you can cast, but if it does, Acid Fog, Cloud Kill, ETC, just became a whole lot more useful for you. I think this might be the case... But I am not really sure. Can anyone verify? (My days of playing an 'archmage' were years ago... Back when this PRC was a lot more buggy...)
As for other Archmage High Arcana abilities... They can be nice, I suppose, but Archmage 6 techncially gives most you can get from this PRC class. Thus, if you do not want 10 levels of Archmage, you can go for just 6. This means that you can get 4 additional levels of wizard, and go for a build such as Wizard 9/Harper Mage 5/Arcane Scholar 10/Archmage 6. You would not get any extra feat, but you could take Spellcasting Prodigy at level 1, able Learner at level 3, and the two feats to qualify for Harper Mage at level 6 and 9.
And speaking of builds... like this, Wizard 10/Harper Mage 4/Arcane Scholar 10/Archmage 6 could also be considered. You just have to spend the Wizard (10) bonus feat on a spell focus instead of getting it through Harper Mage. This would net you one additional point of will saves and cost just 2 skill points.