Chosing the right knife for a tactical environment is often a startingpoint for many akward discussions. The reason for those discussions is simply that many people arent able to see the different applications a „tactical“ knive can have which are namely:
Some blades are able to perform well in all three applications, while others are tailored for a certain application. A good example are a SOCP Dagger or a Karambit which are second to none fighting knives in my opinion but really suck in Fieldcraft and Survival tasks.
A Field Knive on the other hand is great in performing fieldcraft related jobs but is to big for fitting into a dedicated survival kit and therefore cant be hidden from detection, it will also most likely not be a useful tool in modern knive fighting.
So it would be the best option to carry three dedicated knives? Maybe, but this idea should be filtered by aspects like weight and the likelyhood of actually doing a certain application. So if your main job is kicking doors a MultiTool and a SOCP dagger would be a wise decision as the possibility of you chopping wood for a fire during a direct action mission isnt that big.
GearAid, formerly known as McNett, surprisingly entered the knive market with their Kotu Tanto a few years ago. The idea behind the Kotu is to create a „jack of all trades“ solution which is compact, features a combat oriented tip, will being stable enough for prying and other fieldcraft applications.