Use the tinfoil hat trick, grab a familiar that can speak, and have it ready an action to call out the Shrink Item command word to block LoS and LoE any time you want it to.
This means that once per round you can become immune to virtually anything.
You have to have permanency on the "hat" to reshrink it, or re-cast Shrink Item on it. So getting it every round would be a bit trickier (you'd need extra standard actions, if you wanted to do anything else). Of course, you shouldn't need it every