Today my wife and I taught a friend Sentinels. We played with Unity, The Argent Adept, Tempest and Ra. Being out first game we played again Baron Blade in normal mode in the Insula Primalis. There was a lot of synergy and we ended up having the volcano make the crushing blow on Baron Blade (achievement unlocked) :) ... But then our friend said... lets keep playing. We went to reset the game when he said, "No let just bring another villian out and leave the rest the same." So... we brought out Omnitron (again on normal mode) and ended up defeating her(he?, it?) as well. I was wondering if anyone had done a "campaign mode" of sorts with villians like this before, at least with the less difficult villians it was lots of fun, and still a challenge as we had spent a lot of health and resources to defeat the first villian. He also enjoyed being able to keep on going without having to learn another character or get a new set up in order to keep on playing.
Thoughts? Other experiences new players have brough to the table which has enriched the game for you?