I am starting this thread as an attempt to mind meld with everyone about different army compositions for beating all five of the Time Rift Dungeons. Each day presents different challenges, and I presume these challenges can be countered with well thought out Eddies and Allies. Share your tips and thinking here starting with...

Thursday: Sentinel
Core Challenge: Debuffs, stuns, tanky enemies

To kick things off, I've noticed that some of my characters appear to do no damage to the Lord of Light in chapters IIX through X. My original Eddie seems to do no damage (Warrior). My Allied General does some damage (Sentinel). I can't remember more off the top of my head, but maybe this is a clue?