Most daubs (in my experience) can not be done with colors directly out of store bought containers so what ever you get needs to be compatible with other products you use. Also brand depends on how much paint you will need ( I do a fair amount of these and find that the Testor bottle are too small in mnay cases for my use.
Then as Bob mentioned it depends on the specific mark since some are brushed, applied with a paint bottle or with spray.
SO I have a box with 8-10 rattle cans (use the tops at times for mixing) a couple oc cheap ice cube trays for mixing, an old magazine for spraying and daubing stamps into (plenty of people have watch that demonstration at shows), about 50 small jars of model and craft paint as well as some pints of Rustoleum and the like