I can't imagine not using flux!
I have a Hakko FX-888D. It's pretty good, although I wish there was some way to switch tips that didn't involve letting it cool down to a safe handling temperature.
I am curious what you mean by rework tweezers. Link please!
Another link for folks: https://www.amazon.ca/dp/B077BQWMTY
I go through these for solder flux removal like crazy, in combination with an aerosol can of MG Chemicals 4140-400G. Sadly, I think that stuff is unobtainium now.
How ofter are you switching tips? It's been a while since I did any real soldering, but I don't remember often needing to switch in the middle of a session.
I swap the tips on my Hakko without letting it cool down, I just use a Knipex pliers wrench so I don't burn myself. I keep my spare tips in an altoids tin, so I can drop the hot one in there without burning anything.
>> I am curious what you mean by rework tweezers. Link please!
Hakko FM2023-05 Mini Hot Tweezers Kit or Hakko FX8804-02 Hot Tweezer for Hakko FX-888 for example.
>> I wish there was some way to switch tips that didn't involve letting it cool down
I replace tips while hot: the sleeve is not hot.