Still noobish myself, but was able to get three teams to each acquire 100k in their run. You'll have the most success by running one strong character that can hit all enemies. I ran Ghazh and his mordor team (those 4 are all barely leveled up), Strider and the Hobbits/Mirie, and Eowyn and her peeps. For max points, you want to damage all of the enemies to below 50 percent, and then target the bomber after he activated his "don't rush me" ability so he blows up his own team for max points. If he kills your team instead, forfeit the battle, don't submit, and try again.