If you have that few exotics, then your best bet rn would be to level up two other characters to 30 or so and do the weekly heroic 3 times each week for the coins. Xur will be your best friend until the only exotics you are missing are the rarer ones to get.

I'm working on it I have a lvl 29 3/4 the way to lvl 30 and a lvl 27 hunter an a lvl 6 titan just able to do nightfalls did my first one las week and got a bad perk dead orbit hand canon. Working on it.