Range (or Target): Firelight. Equivalent to Voice +1, or Sight. See this thread for further details: https://forum.atlas-games.com/t/question-can-firelight-be-a-range/7601/1
It's a bit stronger on flavor than on rules mechanics, but it should easily be workable with a minor breakthrough, and possibly workable with a +1 magnitude premium.
Target: Sigil. Equivalent to Group +1 without a minor breakthrough. This Target will affect anyone bearing an appropriate sigil, such as a crest of arms, a purple feather in their helmet, or ash in the shape of a cross on their forehead. Alternatively, it could affect anyone in the target area that lacks such a sigil. The decision is made at the time the spell is invented.
Note that this does not dodge Hermetic limits--to affect more than ten individuals, the magus would have to apply a +1 size modifier.
The Sigil Target would be useful in a large, hectic battle. For example, a magus might invent a Muto Corpus spell with target Sigil. Everyone bearing the appropriate sigil increases in size by +1, gaining the appropriate bonuses to strength and wound increments. A magus may cast this spell on the heat of battle and it will only target his allies that bear the appropriate mark.
An opposite usage: A maga could invent a Perdo Corpus spell of target Sigil that inflicts a light wound on anyone in the target group that does not bear the sigil.
A Minor Breakthrough would let this be cast at Group instead of Group +1
Alternatively, Sigil could be replaced by a simple matter of adding a Rego Requisite and +1 magnitude, but I like this flavor.
Range: Breath. Affects whatever the magus is directly breathing upon. Equivalent of Touch +1 without a minor breakthrough. This is useful in social situations where a magus might want to be undetected, where a range of Touch or Eye is too obvious (and a Sight range is unnecessary). This is moderately useful but (IMHO) also thematic--imagine breathing on someone and knocking them unconscious, or blowing on water to turn it to ice.
A Minor Breakthrough would let this be at Touch range.