My thoughts were what tools were essential for an urban pack?
A Leatherman type multi-tool
A 4" crescent wrench
A mini vise grip plier
A multi bit small driver set
A pry bar
A hacksaw blade
For me, the Leatherman Surge keeps me from needing a hacksaw blade. Leatherman bit kits in the sheath with the Leatherman solves that issue. I really like the Leatherman bit extender -- it makes the bits easier to use and works with the Leatherman bits or standard screwdriver bits.
A small pry bar can be very effective and light; I'm partial to the Pocket Widgy.
A second, smaller multitool (like an LM Squirt PS4) can allow you to do a few things that require two pairs of pliers.
The one thing on my list that wasn't on yours is a dedicated folding knife.
Vise grips and crescent wrenches are relatively heavy, while many of their functions can be simulated with the Leatherman's pliers. They'd be high on my list of additional hand tools to bring with me in a bag of tools but a bit too heavy for EDC, for me.
For me, the silcock wrench / key is a head-scratcher -- I've never met a silcock I couldn't open with a multitool.