i was bored and decided to see what it'll take to hit level 31. its been about 7 hours of game play today, but most of that is spent just leveling gear. it really helps having 2 (or 3) of the same class since you can swap and redo bounties, daily story, etc and put the gear you want to level on. I guess I shoulda used one of those items that boosts your XP but I couldn't be fucked.
anyways was pretty simple, on char 2 bought the gloves/boots from vanguard for 150 tokens total (i think), put them in the bank for char 1, then did a whole bunch of bounties and patrol missions. oh did the nightfall earlier for the 20% rep boost. after about 4 hours i was done leveling vanguard a rank (could have done strikes too but I was playing solo in the day). Got a bit lucky, the vanguard rep up package gave me the new warlock chest and a token. Used the token to buy a helm, bam now I have 4 pieces of light +33 gear which should get me to level 31 when they are all maxxed out. Even swapping to char #2 and doing some bounties wasn't enough to fully level up the items, I'd have to do another hour or two of patrols or PVP to probably max it out.
Anyways thats it, didn't really require a single thing from VoG and I could have done it all as a fresh level 20, just needed vanguard rank 3, 270 tokens (across 2 chars), and shitloads and shitloads of mats. If the next DLC is the same, best thing to do is max out all your tokens, get your vanguard and crucible rep a hair below the next rank and leave it there, get 10 bounties done and ready for turnin, and farm stacks and stacks of upgrade mats.
When the DLC hits you can more or less immediately buy 2 pieces of gear, turn in bounties for rep up, maybe get some free gear otherwise buy helm/chest with tokens. Doing it with 2 chars of the same class makes it a cakewalk, and you will be immediately ready for the next raid.