mk 9 is current components yes (I don't think mk 10 currently exists)? basically the highest level crafting component, I have found biochem ones to be easiest but whichever materials are easier for you to get, since costs are normalized. not gear - that's to pricey, crafted components that you use to MAKE gear, so like bonded attachments and the like. just RE them.
I know how to re the crafted shit to get the component but which item gives the mk9 components. I've re all kinds of stuff and get nothing.
either I misunderstood your question, or I'm not explaining it right? MK9 is the highest level right? the highest level crafting component you can learn is RE-s into MK9 components. crafting components that use lvl 9 mats basically. for example - for cybertech, that would be polished aluminum cyber assembly component, for biocheck its fresh red cell graft, etc
last I checked - mk 10 components are not in game yet, they are Kotet items.
oh and apparently https://torcommunity.com/database is fully updated and current nowadays? huh.