I notice you're taking Fiery Burst at 5th, which is not a legal bonus feat for a 5th level Wizard.
"A wizard can take a reserve feat as her bonus feat at 5th, 10th, 15th, or 20th level, in place of a metamagic or item creation feat." Page 37, Complete Mage.
metamagic school focus can arguably drop the +1 level modifier down to +0
What is this wizardry!?!?! I must haev it!!!
OK, this is looking good now.
6th. imbued summoning (phb2: apply Displacement, Girallon's Blessing, Heroics, Hamatula Barbs, or Mage Armor to summon)
9th. metamagic school focus
10th. spontaneous divination ACF
12th. energy substitution (electricity)
15th, A. Augment Elemental (Magic of Ebberon, stacks with Augment Summons)
15th, B. Sudden Maximize
18th. Beckon the Frozen (Frostburn, +1d6 to natural attacks for summons)
I don't really like Beckon the Frozen being tacked on the end, when an extra d6 probably no longer matters much. However, I can't see where else to fit it in! I might be able to juggle the spontaneous divination ACF until later, if my spellbook fattens up with a bunch of extra spells. Or maybe give up on energy substitution and accept that I should have a few lightning bolts prepared just in case fire isn't a hot option.
In any case, I seem to have gone from not enough options to too many, and I want them all now.
What kind of conjurations are you emphasizing?
@ 1st level summon: celestial badger, with rage
@ 2nd level summon: celestial riding dog, using trip
@ 3rd level summon: celestial bison OR fiendish ape
I love the ape's reach, and cannot wait to summon him with Imbued Summoning so I can use Girallon's Blessing to give him 4 arms & a rend attack. Also, as the level 2 spell, I will sometimes request 3 of the level 1 spiders. Then I just have them spamming webs at enemies.