Crimson Dragon

To obtain this achievement in the easiest way and less time consuming way possible choose the level "thinning the herd" in the "lava lake" missions this will give you 15000+ experience each time you complete it.I'ts the easiest mission in the game and really easy to obtain 3 "s" ranks on for a total rank of S.Make sure you use a wing man that's max lvl.I'd highly recommend avoiding the wingman secondary power/weapon soleil and it misses the target 90% of the time on this map.The best wingman power is "thousand fists" this will easily eliminate the boss enemies in seconds.If you find the experience is dropping form 15000+ make sure you're using a low level dragon which won't be difficult as long as you've a max lvl wingman.

This can take a long... long... time (And level 40 isnt even the Max) You're looking at just short of 40'000 exp a level in the high 30's.

Unfortunately exp seeds cant be used on the player so it can turn into a grindfest.

There are two ways to accomplish this, and both will require a lot of time.

1) Either you pick one of the later levels ("Lost Colony - The Truth will Out" net me about 13k with an S rank run) and just keep doing it over and over (One you can do well as your Exp reward is linked to how well you do.)

2) Or, you set yourself Goals to complete, i wanted to evolve and max out each dragon species and try to get as many of the medals as i could, it gives you something else to focus on while the Exp comes in.

Good luck and fly well Seekers.