Firstly, you must have a 335 character. Complete the weekly CoE, nightfall, and Raid until you reach it. Secondly, you must have a lot of time on your hands! Go and play a bunch of crucible matches and farm for 3oC. Trust me, they work. It's just rng. Lastly, use the 335 to decrypt the engrams and get 335 light drops out of them. Then you transfer over the 335 weapons and armor to your secondary characters. Infuse the gear and there you go! It's very simple and probably the easiest way to reach 335. Sadly, it took me a bit to get a 335 helmet but rng allowed me to have one. My new titan, who I remade for like the 50th time, went from 310 to 334. My warlock is 335 and my hunter is 332 I think.