I am looking at a half-elf summoner. Taking the alternate racial trait of arcane training would do what for me? Not sure if I see how the trigger items or item completions figure in. I just know I will not be multi-classing so the two preferred classes do nothing for me.
Also how do things like gifted adept or spell specialization work on a spell like monster summoning? I take it monster summon 2 is a totally different spell than monster summoning 1, but would increased level get you a chance of more mobs of the level 1? or are extra Cls wasted on a conjuration spell?