Targeting is solely for user-input - it has nothing to do with output. Ask the question: what does the player have to do to cast this ability.
Area of effect is a damage classification. Both "spelleffects" and "damagetype" are used for damage classification - and you've been adding spellaoe already. Area of effect and spellaoe can be used interchangeably, by the way.
Regarding Brand's innate - spelleffects and damagetype both accept "Special" which says "See notes", and you should describe the multiple classifications in the ability details.