Sounds almost like my bag, except for the Feildpeice, I use Fluke, and Red snips. I also carry an inspection mirror, one of those neato angled ratcheting screwdrivers, a digital sling psychrometer, a cruddy digital manometer,a schrader replacement tool with ball valve, a modified ECO to test thermocouples and thermopiles, and a rag.
In my main service bag I have 2 adjustable wrenches (and the standard wrenches listed above), 1/4, 5/16, 3/8 nut drivers (1/4 and 5/16 are the long magnetic version). 3 straight screwdrivers, 2 philips, 2 stuby straight and phillips, 1/4 and 5/16 stubby, needle nose pliers, wire strippers, wire crimpers, dikes, service wrench, small t-stat type screwdriver (with schreader tool on the handle), 1 tiny philips and 1 tiny straight screwdriver, flashlight, roll of electrical tape, small plastic storage box with assorted wire nuts and crimp connectors, my custom valve opening service ratchet, fieldpiece stick meter, amp clamp and temp head. Jumper wires, green snips, I also carry one of them cheezy charging charts they give out at the supply house, ductulator and a small notepad. I think that's about it, but I'm sure I'm forgetting a few things.