Missing heroes:
After completing the final mission you will able to pickup quests that allow you to add any heroes you previously missed to your party.
Reducing Elementalist damage:
There is a high number of Dervish an Elementalist bosses that can easily deal over 200 damage. Taking a monk with Protective Spirit will only cause them to damage 10 of your maximum health.
Sixth God Statue:
Successfully complete the game. You will now have access to the sixth God Statue in the Chantry of Secrets.
Spell interruptions:
The AI can interrupt skills and spells in a split second. If you think you are about to be interrupted, stop the skill with [Esc] then re-cast. This stops you from having to wait for the skill to recharge.