A worthwhile question. Ask what each type of fire starter / tinder can do other than start fire. Ask what unique fire-starting characteristics of each type are. Then decide for yourself what mix, if any, makes sense in your situation.

Play with every kind you can get your hands on!

Edit: About once a year the Sacramento Tracker Group gets together with every kind of spark and fire starter and every knid of tinder we can get our hands on to play / experiment. Maybe you can get some friends together to do the same [or join us if you are in the area].

Get real world introductions to what all this stuff looks like, how it acts and works. Form your own information base and make informed decisions based on direct personal experience.