Over the years I’ve used a number of rotary tools and bits. In my experience I’ve found out a couple things.
What bit is the best: It depends on the job
Which rotary tool is the best: It depends on the job.
What type of metal, carbide or regular should one use: It depends on the user, the speed and the job
What causes my bits to be clogged up? It depends on the wood, it’s wetness, the user, if you clean your bit as needed and the speed. However burning on a bit is usually the users issue. Some jobs take a lot of time and some types of material clog the bits faster than other.
Sometimes I end up soaking a couple clogged bits at a time in solvent while using another clean one, brushing, drying and rotating in another bit as needed.
This job required me to carefully grind off bark off an Eastern White Cedar. I found myself constantly cleaning bits and cleaning and regreasing my flex extention shaft.... 40 hours plus to completion.
So it all depends! My advice is only get the bits you need. Keep them clean, then clean and oil each before storing.
Learning which is the right bit or tool will require a bit of trial and error. Same with choosing the proper speed. (Be sure whatever rotary tool you get is variable speed.) Wear safety equipment and have fun!
cheers
DSD sends