There's ONLY ONE way to get to 335.. they stated that directly. POE challenge is the ONLY way to get 335 weapons and gear.. aside from the occasional artifact.. but I would assume the lighthouse would also drop weapons up to 335.. but they haven't exactly given me a reason to believe they have common sense in the year and a half this game has been out.
I will Just chill...in few weeks they will rise the light level again..I will be 400..Taken Crota.
Why bother with 335? you will ended up 334 forever anyway.
I would do Poe 260 first since yesterday they said it's the place to get to 320. If it is possible and the fractions, vanguard and engrams are updated do that too. Get all 3 chars at 320. Titan already 319. Warlock and hunter 315. Not that much work. Once at 320 with my clan do 320 Poe and score card every week till I'm 335.