Could you not combine the two?
I have personally found having multiple strings to my bow has been the key to having fun at Empire. I’d say the Amenisa trick isn’t going to come up that often, but when it does it could be amazing roleplay. (Although if you have a mana site you should get reliably a ritual or two cast an event.) The Amnesis ritual going off is the type of experience that makes a game for you. Healing is something you will use every event if you take the field but is far more forgettable in the long run.
The Empire system heavily rewards being a jack of all trades to a degree, Curing heartbreak sounds an amazing direction to go from the brief, but it’s a Night 4 ritual. 2 Ranks of Night (and taking it as one of your 4 ritual masteries.) Let’s you cast that anywhere, it seems a good point to stop. That’s still 3 exp left to buy into magical healing, so extra mana, repair limb, heal (Or two extra mana and try to get heal from somewhere.)
From a Dawnish perspective being a healer who chose to focus on the ailments of the heart, seems like a really poetic direction to go.
So Firstly Dawn is mostly summer mages, by which I mean Dawn has managed to secure the spot of being the best nation for summer magic by virtue of throwing hordes of amateurs at the regio.
This does not mean there is ONLY summer magic in Dawn, there are definitely night mages in Dawn that you could potentially work with.
Also while we don’t have any Night mages, perhaps a background link with the Crimson Petals who are a coven dedicated to helping lovers, would give you some connections before going in.