I have the Topeak tool listed above and a smaller Topeak Mini version since 2014. I don't get much use from them because of their shorter tool size to reach some bolts, the tools don't lock in place to hold steady as you apply torque, and sometimes unable to put enough torque to tighten/loosen things because of shorter tool size. I found out if I don't use the multi-tool at home, then I won't like to use the multi-tool on the road.
I ended up just using
specialized tools I keep in a Ziploc bag I can transfer to other bikes to carry in the rack bag or backpack. I also have more heavy duty tools in a small tool bag I can toss in the back of vehicle if I need to hit the road with the ebikes.
What I always carry for flats:
Park Tool Valve Core remover
Screwdriver with 2 flip-able Flathead and Phillips heads
PSI gauge
small wire cutters (for zip ties)
zip ties
18mm wrench (for removing rear tire)
Topeak Mountain Morph bike pump
spare tube
Stans tire sealant
tire patch kit
5 velcro straps (to help set the 26X4 120 tpi tire when trying to air up a flat)
General Tools in another ziploc bag in the rack:
Spoke key
Park Tool Y-design Hex wrench (4mm, 5mm, 6mm)
2-3 Assorted smaller hex wrenches
paper shop towels in a Ziploc bag
individual handy wipe packets
XL rubber gloves
small tarp (sometimes I need to flip the bike upside down to work on in the field)
cheap $12 safety goggles with 1.5X bifocal (hard to see fine detail sometimes in low light)