A couple of questions

[PvK]

1) There are some others. The staff of many hands, for another example. Also, increasing the skill level in the main path of the spell.

2) No, units with special morale don't add to the group's morale. I think it's actually counter-productive to a group's morale to mix with morale-30 & morale-50 units, because they can get hurt, but I think they contribute zero morale, whereas if they were in their own group and they got hurt, they wouldn't affect any routable units.