Naturally the easy answer is to just splurge on e.g. the official Harwin, JST, and Molex parts and tools, but even if one finds the crimping tools used on EBay or so, that is still a lot of money ...

Wire stripping is a necessary part of any crimping operation, and some tools incorporate blades for this purpose. Crimping tool kits may extend this further with the addition of cable testers or ...

For the most part, though, I’ve moved on to ratchet-action crimp tools. I find these superior in every way to simple crimp tools, especially since they can’t easily over-crimp a connector.