Khaly:
only put the melee/tank units in the front, with the tank champion, and the range champion in the back with a healer. Thats been working for me, and taking the XP misions was a really fast boost up to getting my champions into the high teens now.
I only lost one mision, the rare ‘story’ one with one gold mob. I didn’t put in enough units as I thought a slim margin would be enough (the blue attack/health numbers on enemy side vs mine)… not so.
Also, usually you’ll get about 20-30 anima from a mission, which will take 14-20 to send, so you can make a slim bit of anima on these, and not lose much overall.
Getting the Companion App also makes this much easier.
Great strategy.
Also, I throw all 3 of my champions into the XP mission at once. I have not verified whether or not all three get the bonus XP, becuase I hate math, but I dont want to chance it being wrong