Harps ingredient missions

Help!! I keep having trouple trying to catch Harps in the ingredient missions. When a harp is almost at low health, and i go to capture it, it only says like around a 43% capture rate which is weird. So is there a way i could catch one with a better capture rate or are there any tricks or tips to catch one??

Nope just get lucky

You could also run their respective element dungeon in chapter 4 of the online missions so that it doesn’t cost you any keys. Low encounter rate and low drop rate after beating the boss battle but you don’t have to wait for key refill only ticket.