Anyone have a "toolkit" that they put together for emergencies?
Hmmmm. Don't have a toolkit for 'emergencies'.... don't have any.

Except maybe some spilled
juice, then paper towels and IP alcohol are always handy
Most tools are used for rebuilding coils/wicks. These include multimeter, tweezers, fingernail clipper and/or wire cutter, #2 sewing needle, needle-nose pliers, jewelry screwdrivers, scissors, & dental pick. Along with wick & wire of your choice of course.
For general upkeep, mother's metal polish, emery cloth, and noalox.