Ouch, wall of text.
TL;DR.
However, my answer to your question is - i built my Favored Soul to support the party.
NOTE: Supporting the party is different from BABYSITTING a party.
I toss out heals IF needed, use offensive spells to help.
But i NEVER babysit a party.
You want a babysitter?
You're lookin in the wrong place then.