Pulls

I wanna get E0S1 Constance at least and if I can get smh further should I chase E1-E2 Constance or Fugue instead? Which is more effective altogether? I don't have Firefly nor wanna pull for her, gonna wait until in future we get a main break dps other than her for Constance, but until then what's the best investment? I feel like Fugue is not that futureproof does she? Have the feeling that if I'm waiting for a future break dps it's kinda Constance the only one I need to have. Fugue can be replaced with RM or TB until then and E1-2 might be more impact with the future dmg dealer. Any advice?