For difficult missions, it would be helpful to add NPC heroes who fight on your side.
For example:
Please add 3 NPC Fire / Fire blaster heroes to the Croatoa mission of "Stop 30 Fir Bolg from entering Door". Otherwise, the mission is too hard for majority of heroes.
By adding 3 NPC Fire / Fire blaster heroes to the mission, it makes the mission more interesting, and it also makes good use of NPC heroes where they are most needed.
I am suggesting 3 NPC Fire / Fire blaster heroes because Fire / Fire has fast animation times with powers that do good damage, and 3 NPCs correspond to the 3 different entryways in the stone arch / door.
Thanks. -- Lloyd