Since you mention that you know to get timeless gear and have gear from LFR, so I'll assume you know how that works, I'm not sure what your question is. Are you asking for someone to help you get gear? Asking for advice on how/where to get gear from? Asking if you've set your gear up the right way?
Run ToT and SoO LFR to get gear, and start running Flex once you hit ilvl 510 or so. Try and get a weapon; getting a weapon upgrade will give you huge DPS increases.