Cheap ranged touch attacks

[phaedrusxy]

I'm looking for ways to get items that I can use for lots of ranged touch attacks. The cheaper the better. My sourcebooks for spells and items are limited to XPH, DMGI, DMGII, PHBI, PHBII or Magic Item Compendium. I can get things outside those, but it costs double. Consumables also cost 3x normal. I'd considered getting an item that can cast Fire Shurikens, but am not sure how the arena rules would work with that, given limitations on number of pre-cast spells you can have, etc. If I could somehow modify normal items to be more effective (a buff that can hit like 30+ acid flasks at once to enhance their damage), that could work as well. Self-buffs which enhance damage could also work, and I'm already considering a few, but more options is always good.

[awaken_D_M_golem]

Pyrokineticist 1 , but isn't item based.
Souping it up though, would be items.
Like morph into a Marillith.

[Kethrian]

Talon Sceptre, MIC pg 210.

[phaedrusxy]

I guess the easiest thing to do is go with alchemical items (what I'm currently doing), but find a way to add more damage to them. I've considered Knowledge Devotion, but a cloistered cleric dip isn't really feasible, unfortunately. The psionic power Prescience, Offensive could work, and I'll probably pick that up at some point (the character is a wilder gestalted with ghost).

I'm going to be throwing massive amounts of things (like 15 per round). So things that are like 1 attack/round won't work.