The best gear you can get as in the most possible mf? (Ignore the part at the bottom that implies you have to have high amounts of mf to master the art of mf. That theory alone is newbish.)
Outside of that there really is no "best " gear. Its all about being able to kill and survive efficiently over many, many, MANY mf runs. Any mf gear you can load onto your character is while maintaining that efficiency is just gravy.
All the mf gear in the world will be useless is you die every time something touches you.