After learning how Reference storage works with help from tpt user Jerehmia, I've made made my first save combining all three FILT memory techiques; Easy storage, Reference storage, and FILT sharing storage.  Here it is:

Easy storage:

Serialized life values are stored in a single pixel that is read by a deserializing LSNS, written onto an INSL, and displayed on a sign.

Reference storage:

The reference library (the line FILT read by the lookup table) is made of 85 shared storage FILTs (see below); each one is assigned a smaller easy-to-remember number.

FILT sharing storage:

Each FILT in the reference library (see above) is a shared storage FILT, each containing three 8-bit numbers; with a shared storage FILT selected, the numbers on the FILT are singled out by AND FILT and then blue shifted as needed, before the 29th bit is turned on the serialize the number.  The whole setup stores one byte, so the refernce library would typically by 255 pixels long; with FILT sharing storage, it's only a 1/3 of that length, so I have tripled the storage space.

The three FILT storage techniques are not talked about enough; it's facinating how much data they can store when all used together.  I encourage everyone to make their own saves that use all three FILT memory techniques at the same time.  Make arrows and labels pointing to where each technique is being used and post your save in the comments on the linked save or in this thread.  And to Jerehmia; thanks for all your help.