So got to thinking of going into two separate builds at once and naturally overstretching myself, but wondered... can you do a MI build supported with Righteous Fire, or the other way around?
Going with a templar and going for large ammounts of life regeneration to keep RF up with a large life pool, then minions as a meat shield and MI damage.
Also does RFs spell damage up affect MI? Probably not but not sure, this would decide on whether or not to level the aura naturally.
Edit: more of a placeholder skill tree but take a look and see if this is enough.