Gating in and optimizing a heap of lantern archons [PF only]

[Carth]

Lantern archons (http://paizo.com/pathfinderRPG/prd/monsters/archon.html) are unique in that their ray attacks can damage anything (I think?). Gate is nice because its casting time is only a standard action, meaning the called creatures act in the same turn that you call them, and you can order all 20+ archons (they're 2HD each, and gate lets you summon CL*2 creatures) to fire lasers, effectively unleashing 40d6 damage as a standard action. The trick is getting them to hit. What ways are there to augment their attack rolls, allow them to reroll them, or otherwise improve them?

Also, what ways are there to raise caster level all day long in PF, so as to be able to summon more lantern archons? Any and all, no facet of this build is set in stone, other than the concept of summoning tons of lantern archons. Spell perfection with spell specialization and an ioun stones are the only things that come to mind off the top of my head. That's good for CL 25, which by casting a second gate with a quicken rod, allows for 50 archons firing a total of 100 shots.

Edit: and before anyone brings it up, I can trivially get Excel to roll 100 sets of 1d20+3 and sort them from highest to lowest, then roll the commensurate number of 6s, so this isn't something that will slow down combat any more than summoning normally does.

[avr]

For a start, there's having a bard on hand to inspire courage. If you can spare a round before they attack then they can use their own Aid spell like abilities on each other for a +1 to hit. Since you'd have to be able to cast 9ths to do this, quickened mass cats grace should be doable with a rod or with a level of metamagic reduction. Heroic invocation (http://www.d20pfsrd.com/magic/all-spells/h/heroic-invocation) would be great, but if you want to quicken it so it takes effect the same round you'd need a rod to do so.

Debuffing the target might be more cost efficient than buffing a large group of archons. There are hundreds of ways to do so.

[avr]

And Haste, of course. Even quickened that's 7th level for a wizard/sorc, 6th level for a summoner so quite doable for someone using gate.

[Baroncognito]

For a start, there's having a bard on hand to inspire courage.

Or having a Lillend Azata on hand, as long as you're summoning things.