This is a slightly 'higher level' trick:
Get yourself Gloves of Endless Javelins (7000gp, part of the set 'Array of the Manticore').
Free action to create a "+1 javelin made of pure force" in your hand. It's force, so no miss chance!
Free action to drop said javelin. (The javelins don't disappear until they've been used in an attack or until the end of your turn)
Repeat until you have dropped your manifester level in javelins.
Use your standard action to manifest telekinetic thrust. 5pp, dealing between 5d6+5 and 15d6+15 magic piercing damage as a force effect (damage depends on your manifester level).
Done.