Kiting missions is deffently worth it.
On my Nt back in my young days. Thats like lvl 50ish. I started to kite missions simply because I had a hard time both finding a team and I lacked of time to much RL stuff to do. So missions were a nice thing to do, kite a few missions get your token and reward and loot all corpes. At lvl 105 I had my 1k board and never had to xfer creds to my Nt of the simple reason, I gained loads of monney from loot and rewards. got 50 lvl's and 1k tokens in well 3*9 missions a day some times more. So roughly a week.
Later more specific at lvl 200 i started to kite again, I gained my 1750 tokens in 3 days and about 20 mill creds.
Phew 1750 tokens I felt I was about to have the "tunnel injury" but never the less, I wanted the 2500 board badly. And what does 750 tokens mean when you just 750 ;)
so at tl6 I gained my last 1500 tokens in hang on now. 7 days. and another bounch of creds, I dont have an exact number of it this time cuz i started buying stuff, but id say about 35 mill from loot again and rewards.
But last piece of advice pull green missions :) simply becasue you dont want mobs that require 60 AoE's on them, the green mobs at lvl 200 only took a maximum of 13 nukes, tho hellhounds took alot longer to kill.
I did some token farming on my soldier aswell at her 190's I gained 3 lvl's in a day with missions I'd say thats pretty fair for 4 hours of work, besides all the lovely tokens I gained.
So to sum it all up, kiting missions is really worth it, XP, creds, tokens can it be any better?