Pelican case with:
PVC and hypalon patches + Glue
Pressure relief valve.
Hex Key x 2
1 flip tip screwdriver
Tear Aid A & B.
Spare frame quick release pins x 2
Spare frame 3/16 self cutting hex thingies
2 pair nitrile gloves
In captains bag:
Z-drag with 100 ft of webbing for attachment, or cross river line setup.
Compact top off/repair pump.
First aid kit with CPR, and light trauma kit.
DRE sells a premium patch kit with some of this, and I just shove the rest in there. I also squirrel away some tearaid in a double ziplock inside of my PFD with my flipline, just in case something happens to my repair kit, or too toss at people on the shore if I can't stop for long.
I don't worry about mixing cups. EMT shears will turn any beer can/water bottle into a mixing cup inside of a minute.